It seems that very important use case for the author is developing/programming and compiling software on the phone.

I work as a software developer for living, and ignoring the part that there are other things other than actual programming that can be done on any phone, I never had the urge to program on a phone. None of my friends or colleagues wishes to do that either.

I prefer a monitor, but laptop would do. But using smartphones for 15 years, I never complained that I cannot program on them.