https://affine.pro/

Finally past the point of hollow promises and has a couple unique approaches to mixing documents with canvas

Seems to have a good grasp of technical documents too, with tables/kanbans and more in the mix...

Looks interesting – AnyType is trying to do something very similar in the open-source space, of course (anytype.io). After deleting the latter from my system a couple of months ago, recent developments have caused me to reinstall it (even though it's enormous on macOS – more than half a gig!).

However, Affine is clearly much further down the collaboration road than AnyType is.

... although AnyType already has mobile apps; I notice they're still on Affine's roadmap.

And, after getting quite excited by their pricing (currently very modest for teams in particular), the usual disappointment: the search function is poor.

How people can develop big, sophisticated content/knowledge management systems without prioritising the search function is, frankly, beyond me.

The best I've discovered to date is Coda (coda.io). The search and filter functions there are slightly idiosyncratic, but extremely powerful.