That's a bad move of Google, this has no reason at all!
Chroot/docker will use a more practical way to run Linux, as Android is just a Linux distro, why bother with running a whole another kernel!
You can say: "I use Arch, Fedora, Windows, MacOS, Gentoo, LFS, Debian, PopOS, and more, btw."
Well, not exactly. Any distro COULD be used for development and excel at it, but there are a few intresting options out there. I personally use Fedora with KDE, but if you want to take it to a more advanced level, use arch or nixos. If you want to make your OS, use gentoo or linux from scratch, but very niche and not recommended.
Jetbrains? Use vim :) Just kidding. As for Excel, you can use LibreOffice calc, or OnlyOffice. Or any office... or Excel web. As for onedrive, i remeber linking my gdrive to my gnome files, but i personally don't need it that much, i use git lab/hub. btw as for linking to phone, I recommend using KDE Connect.
remove backgrounds? i think you could find a krita plugin for it, or just use an online website / huggingface space.
Interesting... but well.. Android isn't rooted, so will it use chroot or something like that? Or it will use a whole another kernel, complete VM?