Yea, sometimes new problems need new solutions and the old architecture can get fundamentally outdated!
I admire your effort but there are a lot of people in the open source community and especially on Lemmy that just don't want to understand it, I try not to argue with them but they are fucking everywhere with their trashtalking of various amazing open source projects!
Damn, that sounds like a really annoying issue, good luck finding a solution!
I prefer vanilla Gnome on Fedora too but Mint dose some things really well. Their update manager is nice but that's a Debian tool, their file manager (Nemo) on the other hand is something I still use, I just prefer it to Nautilus.
I love and use Fedora but I still think Mints update manager is the best GUI implementation I ever used for updating, it has all the essentials, is easy to use and looks nice.
We never lost any "ild system" and the rebooting is probably how your distro implements updates, I use Fedora so mine often wants a reboot but that's definitely not the norm on Linux as far as I know and I never had a device turn back on on it's own...
It depends on the distro I am on, if I use Debian or a derivative I usually prefer the Flatpak but on Fedora I only go with the Flatpak if I run into issues or the rare outdated package because I don't need them, I would certainly miss Flatpaks if they didn't exist tho!
It's not really lost ether tho, just add a simple bash alias and you are ready!
You don't really need much of a script, a relatively simple bash alias should do the trick and for new users the GUIs are a better solution anyway and those still update all apps.
The GUIs do that in a even easier way for new users and experienced people can always just add a simple bash alias, a universal command never existed anyway because we have various different package managers on different distros so I don't see any lost feature whatsoever tbh
Apple intentionally builds their devices to not be repaied, there is a BIG difference in technical constraints because of a lack of space and intentional decisions like sothered SSDs with a swap partition (RAM overflow on the storage drive that causes tons of writes) by default or a special storage architectures that has no benefit over existing solutions except that noone can buy replacments. It's not like you need a bulky Laptop for user servicable parts ether, the Framework Laptop isn't the thinest on the market but it's certainly not bulky and if even a small startup can achive that imagine what amazing devices Apple could build if they invested a tiny bit of their money in repairability, and if it's just the part they currently invest in to the opposite!
I use Linux for years and still Google every time I have to use it!