> We're very close to invokers being baseline

Well why not have the benefits of invokers, but today - with HTMX?

HTMX could eventually switch its implementation to use invokers under the hood in the future, and you'd have the convenience of using declarative behaviors on your buttons, today.

> autocomplete can actually be fulfilled with a datalist element

I wish that the spec would cover more use cases, but last time I tried to use it, I couldn't, because it has really bad UX, and is inconsistent across browsers.

Also, like you mentioned, it only works for small data sets that you can deliver with the initial HTML, not large amounts of data which reside on the server.

You could argue that these are use cases where you wouldn't require an auto-complete in the first place, because the data set is too small.