I doubt that future. Traditionally, only hardcore power users are interested in extending software. Normal end users want reliable software that does what they want it to do. Some of them also want a certain amount of shiny buttons and UI effects to look at. I'm not saying there is no market for heavily personalized software, just that it is not going to be big. Of course, people also want AI that acts like a friend or expert and does amazing things. However, I don't believe the two worlds mix well. IMHO, AI substitutes a person working for you whereas traditional software is a tool that persons and AI use.

The experience can be vastly different than deeply configuring a system like a power user. My nontechnical, 87-years-old grandfather is putting together apps to help him with his language practice. He uses Google iirc. The chatbot is a familiar interface since his time working did overlap with IRC, email, early internet, yada yada.

I don’t want to necessarily argue about merit or quality, but I have seen that custom software can be accessible to a general audience.