

Ubuntu (and also Debian that it derives from) are always behind on the software release cycles and contain “stale” packages. This is desirable if you’re running a server, but if you’re wanting a modem day desktop experience a non-rolling release distro is just leaving performance/usability of your hardware on the table.
Think of Ubuntu/Debian and all their derivatives as the Jitterbug of the phone industry. They work perfectly fine, but if you want a real phone you’re probably going to be happier with an iPhone or Android phone just because they make use of newer technology and get updates constantly.
You could already do this for years through the “Files” app, just select the file/files and under the 3 dots “send to safe folder”. And it gets encrypted with a key on your device and if it corrupts or you try to open them on a new phone they wipe and are gone forever.
Google Safe Folder