Why is Photoshop incapable of performing more than 1 undo while typing text?

I think why people are irritated with you is, not so much the choice of words, but that you are blasting Adobe about an action you claim Photoshop doesn't do when, in fact, it does (look for example, at the History states). If you can't be bothered to learn this professional level program maybe you should choose a simpler application that might suit your requirements better.

It's the little annoying crap in Adobe programs that just frustrate me so much

It’s the little improper choice of words on these Fora that annoy me so much.

Have you read the Forum guidelines?

I still can't undo more than once while typing text in Photoshop

I assume you mean that cmd-Z only undoes entering the last letter or paste or delete etc.?

Photoshop’s Type capabilities are somewhat limited, despite some improvements over the decades, and that does not seem that surprising considering that it is intended primarily as an image editor.

Anyway it seems like entering text works kind of like entry in a modal dialog and this might make sense to avoid having each letter entered etc. manifest as a distinct History step.

So I wonder if the cmd-Z in an active Type Layer is actually using some (basic) OS functionality.

You can post a Feature Request over on

Photoshop Family Customer Community

Maybe you strike a chord with others who have to do type-work in Photoshop and with some luck an Adobe employee might chime in.

In your Photoshop Preferences how mage history states do you configure ? I can backup 100 steps. You also can not undo a change you have not committed. foe no change has been made till you commit the change. Also as far as Text go Adobe made a change now by default ESC commits your error. I reverted ESC to cancel the mistake not commit it.  So you mileage may be different than mine if you use Adobe's default bogus change commit mistakes.