Ok, sorry, just now getting caught up on this..... For those wondering about updating past 18.04, don't..... It causes more issues than it is worth, because the drivers for video require Xorg server 1.19.6. also cuda requires everything be compiled with gcc 7. So updating breaks more than libs. As for the Bluetooth headphone issue, I know, but it requires a ton of patches, that need rebased into the new kernel, and with everything else, I haven't had time to do it. As for other Linux distros, some other devs and I have ported arch, Gentoo, and fedora. But none of those have full hardware support yet. As for changelog between 2.0.0 and 3.0.0 check Nvidia's Jetson nano changelogs from rel32.1 to rel32.3.1. once altOS installer is released the other Linux builds will be installable through hos. If you want them now, they are in the process of being revamped, check switchroot discord, most of the devs including me release stuff there, and field questions there faster. I hardly check the forums anymore, outside of releases, and the occasional checkup, to see if I missed something. All of the latest news on switchroot projects, is on discord, and this is here for releases. Also, I don't include changelogs, because there are tons of changes, and I don't always know what exactly they are, as some are from us, some are from Nvidia, and some from Ubuntu itself. Too much to document, and I don't really keep track. Mainly just maintain and update. My project is mainly Gentoo, though I have also helped with lakka, which I need to finish updating, arch port, fedora port, Ubuntu maintenance, Android zips updates, and tons of testing.... Be happy I am persistent if it wasn't for me poking at coreboot for months and asking stupid questions we would still be working on lp0 sleep mode. I stumbled on something that lead to an actual fix, and that led to what we have now, which works in pie and Linux. I have also been collaborating with app devs, like cgutman to get moonlight support, and add decoder support to vlc/Kodi. Tons of stuff, and that doesn't include the new install process, and other stuff that I can't talk about. Lin story short, since there are like 7 people working on these many projects, when they have actual life as well, it is impressive that it works at all.
I hope I have answered all of the questions, and suggest for more up-to-date answers, and faster support you join the discord channel.