I have been looking at Linux on phones(Ubuntu touch) with the intention to use it both as smartphone as well as desktop replacement. It really fascinates me. But it looks like there is no hardware anymore that supports display out and USB dongles. Why are there no up to date phones that have convergence mode?
Phone manufacturers cheap out on USB ports offering alternative display out, because Android has bad support for it anyway and not very many people are interested (for now) in using their phones as desktop replacements.
I have heard that Android 13 is a step back in terms of Desktop mode compared with Android 12. On that second point, modern smartphone CPU are so powerful, it would be good enough as Notebook replacement for most no gamers. Would you agree?
Absolutely, and there are even some nice laptop shells that are just a screen, keyboard and extra battery that you can connect to your phone and use it as that.