All of this is true, but with processing power and disk space increasing, you could envision a world where a phone simply has a copy of a desktop OS that it could boot into for docking, like a Mac with a Windows partition.
I’m sure you could do this with Linux now, it’s just such a niche use case nobody has mass produced it.
I’m sure you could do this with Linux now, it’s just such a niche use case nobody has mass produced it.