The caveat is that it actually doesn’t matter unless you’re only ever in that one app with the screen on. In reality, the majority of phone screens getting brun in are show models in stores and defective panels. But regardless, apps lead you more into fullscreen so you don’t even have those at the bottom.

some of us even doomscroll

That would help prevent burn in.

You’d have to have those pixels showing the same color for quite a long time, like months to years. We don’t typically have our phones on that long, and with more modern OS versions, there aren’t really that many things that stay on the screen anyway. What used to be burned in on phones were the navigation bar at the bottom. Gestures are default now. The icons at the top aren’t actually static for long. And phone screens turn off after a few minutes. Dark mode being popular is a big help because the brightness of the screen is a factor. All OLEDs can get burn in, we just don’t have as many of the things that lead to burn in as before, plus a few things here and there meant to help alleviate it.

I’m away just let the screensaver save my screen?

Yup.

In that case why would anyone ever worry about burn it

Ignorance and the fact that you mostly hear about the people with problems not the ones who just bought their monitors and carried along with their lives.

Consider that almost everyone worrying about burn in has a phone with an OLED screen, that they’re not worried about. What happened with phones will happen with TVs if they ever get cheap enough to really compete with LCD.

This is one of those things where formally, sure, there’s a difference, but I’ve never heard anyone use that first term. Everything’s a loanword. And these kinds of things are in many, if not all, languages, from my attempts at learning other languages.

Basically, it seems to me like the technology in mobile GPUs is crazier than desktop/laptop GPUs.

It’s not. They have the same software technologies and the desktop counterparts have better hardware.

but not by enough that it seems to need to be 100x bigger than a mobile GPU.

Yes it is. No benchmarks would agree with you here. Also, just look at the power draw for each and how much noise each cooling solution makes.

And top end mobile GPUs actually perform quite admirably when it comes to graphics and power.

Depends entirely on what you see as admirable. Power efficiency wise, they’re great, but their performance isn’t anything to write home about, especially considering that they typically share cooling solutions with the CPU. And that’s at the top of the line. Lower down, it’s not all that great, with desktop counterparts having much better 1% lows when the power is more comparable.

So with most of what you said being incorrect, your conclusion is also incorrect. Generally, more surface area on coolers means they can cool higher power limits, can have bigger fans and/or have those fans spin slower so they’re much quieter. Regarding the power consumption, it’s simply diminishing returns. Mobile GPUs are just cut sooner on the graph.

And that functionality is in Gnome, but disabled by default IIRC. I’ve had it on for years in both PopOS and Debian so I may be wrong but I do believe it’s a Gnome feature.

Even if you buy it(which I do support more and more), pirate it. We’re at a point where it’s just far easier to use the pirated versions of a lot of digital items and you also don’t have to worry about someone “taking it back” afterwards.