IntelliJ now comes by default with a local-only AI auto-completer. I noticed that almost always, it "knows" the autocompletion better than the older intellisense.

However, sometimes (very often) you need to explore the API and just check every available method and check their docs to find which one is appropriate to use.

So, even though I can see AI replacing a lot of auto-completions, it just can't replace it completely.