No, because it became a locked down ecosystem that is user-hostile and not user-controllable. I realized this when I observed the younger generation, who I thought would be much better than us at computing, who had not a clue how anything worked because they never had the ability, need, or desire to tinker with the underlying systems, with only rare exceptions (roms, etc).

You are right, in a way. But losing your smartphone is like losing all your personal information. In that sense it is a personal computer.

Depends on your lifestyle and location. The only thing I use my cellphone for is text messaging and looking at wikipedia or part numbers when im not at home. It is definitely useful, but 95% of my computer work is still done on a PC.

> In that sense it is a personal computer.

No it is a "personal", but not "computer".

Not a general purpose computer, but still a computer.

A smartphone (-like device) has indeed the potential to be an ultramobile general-purpose personal computer. Sadly, virtually all of them don't reach that potential.