Intel NUCs were very good machines but honestly they were completely overpriced compared to Chuwi/Minisforum/etc.

My guess is they were just not enough sales, that's all.

GrapheneOS only supports modern pixels though. LineageOS is the one with the largest compatibility with both modern and older devices.

It means 3/4 of the apps you use aren't free software which is not an issue with F-Droid.

Thanks for the suggestion, I just added some responsive support! It's not perfect (it might still be a bit small) but it should be more usable on mobile.

That's just not true, the latest pixels are officially supported. LineageOS is by far the Android custom ROM with the largest compatibility set.