> However, I realize that I would never want to use something like this that would change over time. E.g. if I ran it every 6 months and last year "db" produced "debug", while this year it produces "database". Because talk about messing up my muscle memory and habits. And the language I write changes very much over time.

> However, I realize that I would never want to use something like this that would change over time.

> And the language I write changes very much over time.

Sounds like exactly you want something that evolves after time, since how you write changes over time.

An universal version would maximize the amount of helpfulness on an average for everyone, but a tool that learns from your individual actions, can be much better improvement for you. And by making the tool available to everyone, more people could get bigger benefits from it, rather than just "average" benefits.