I think it's important to note the wider limitations of the homebrew community. I bought an rM2 relatively early on, enough to have lifetime free subscription access that I've never used, as I've always used homebrew arrangements instead.
There is a definite sense that the community is tired and diminishing. I think most packages are only compatible with the at this point quite old v2 software version, including the entirety of the toltec system. Some of the most important hacks, ddvk's packages, are both stagnant and closed source, with hints that being closed source comes from direct threats from Remarkable, not hypothetical concern over legalities. Toltec's maintainers, and others, respond with suggestions that they're going to be updating at some point, and that users are just being impatient, but it seems more likely that much of the homebrew infrastructure at this point will not be moving forward. The homebrew community was once small but dedicated, now I think it would be more accurate to just call it small.
And I somewhat understand that. As much as it has its defenders, Remarkable has been at worst hostile, and at best unwittingly unhelpful. It often provides exactly what it thinks is legally required. V3 changed the format and system enough to break all homebrew software. Whether intentionally, or in response to a well meaning but enormously damaging user suggestion, Remarkable changed its kernel configuration in a very non-standard, non-recommended way with the only significant impact being to make compilation of modules impossible without entirely replacing the kernel (they did, after years, finally change this back). Kernel sources are available, but good luck compiling then. Does the keyboard case even work unless you're using V3, and this break everything homebrew, including that terminal? Remarkable seems like a textbook case of a company respecting the letter but not the spirit of free software. And that isn't even considering the dark patterns they have more generally: the intentionally non-standard USB C port so that third party keyboards that would otherwise work without any problems don't work, the wonky Ethernet-adapter behaviour rather than a virtual mass storage device, the tendency of the USB web interface to repeatedly turn off... there are justifications given for many of these, but as a whole they paint a problematic picture.
And so those of us who use our modified Remarkables increasingly, at this point, are just using devices frozen in time, with everything working for us.
3.x support will come to toltec, I've been blocked by stuff outside of my control a couple of times. Including things happening in my life that I won't get into.
I spent a lot of time looking for a digital notepad, and the RM2 was high up on my list. I ended up buying a Supernote recently for exactly the reasons you mention in your post. Remarkable just come across as a really shitty company with a really shitty (and inexplicable) approach to software for their platform.
There is a definite sense that the community is tired and diminishing. I think most packages are only compatible with the at this point quite old v2 software version, including the entirety of the toltec system. Some of the most important hacks, ddvk's packages, are both stagnant and closed source, with hints that being closed source comes from direct threats from Remarkable, not hypothetical concern over legalities. Toltec's maintainers, and others, respond with suggestions that they're going to be updating at some point, and that users are just being impatient, but it seems more likely that much of the homebrew infrastructure at this point will not be moving forward. The homebrew community was once small but dedicated, now I think it would be more accurate to just call it small.
And I somewhat understand that. As much as it has its defenders, Remarkable has been at worst hostile, and at best unwittingly unhelpful. It often provides exactly what it thinks is legally required. V3 changed the format and system enough to break all homebrew software. Whether intentionally, or in response to a well meaning but enormously damaging user suggestion, Remarkable changed its kernel configuration in a very non-standard, non-recommended way with the only significant impact being to make compilation of modules impossible without entirely replacing the kernel (they did, after years, finally change this back). Kernel sources are available, but good luck compiling then. Does the keyboard case even work unless you're using V3, and this break everything homebrew, including that terminal? Remarkable seems like a textbook case of a company respecting the letter but not the spirit of free software. And that isn't even considering the dark patterns they have more generally: the intentionally non-standard USB C port so that third party keyboards that would otherwise work without any problems don't work, the wonky Ethernet-adapter behaviour rather than a virtual mass storage device, the tendency of the USB web interface to repeatedly turn off... there are justifications given for many of these, but as a whole they paint a problematic picture.
And so those of us who use our modified Remarkables increasingly, at this point, are just using devices frozen in time, with everything working for us.