Any idea why it does require exactly 4MB of RAM, even if kernel is much, much smaller?

It's some kind of default size of memory page or what?

I asked the same answer here but for normal Linux kernel: https://news.ycombinator.com/item?id=26979499

Where does it say exactly 4MB of RAM is required?

Very Cool..

I like the ability to use available software to develop/debug.. Reminds me of AtherOS.

Nice. I will keep this link somewhere in case I have to teach a system course in the future.

The "Favorite" feature is a great way to mark URLs to review in Some Glorious Future.

That's what I meant by "keeping it somewhere" ;).

Somehow the Round Tuits needed to review the Favorites and Pocket never arrive.