> Desktop GNU/Linux programs are either unusable or a terrible experience on a mobile device with a small screen and no mouse.

Is this an assumption or coming from your experience? Because I'm typing this on a GNU/Linux phone in a desktop browser and use a bunch of desktop applications daily and haven't noticed.

Of course if you run GIMP or something like that it won't fit unless you plug an external screen and a mouse in, but all the applications I use daily are perfectly usable. There's a lot of Kirigami and libadwaita programs these days that just work well on a phone, and if I need to launch my bank's application there's always Waydroid.

Well, can you take a picture that looks better than what I made 20 years ago on a flip phone?

I have a pinephone and try it out year after year.. Well, let's just say that there is so many areas of improvement to make "GNU/linux" run on a mobile device (that sorta includes laptops as well, even though I have done so for years) that we might as well start over from statch.

For example one can't just let everything run whenever it wants, wasting battery life. Android's "more complicated" system and binder was criticized in this thread, but that's exactly what ties together the whole thing to be able to run on a device that fits in your hand, with centrally managed "let's pause this app now" etc

Could you please elaborate, which software is usable on mobile Linux except for Firefox? I've seen multiple people using mobile Linux, and they were using Firefox and webapps for everything, no exceptions.