I can't wait until the big distros decide multi-booting is a feature "nobody uses" that "never worked" and therefore isn't going to be supported because "everyone can use VMs" and containers and whatever other solutions that do not, in point of fact, solve the problem.
It does make sense for most distros to not care about that TBH. Advanced users can always put a boot menu in front of whatever their distros provide if the EFI-provided menu isn't sufficient.
https://en.wikipedia.org/wiki/Multi-booting