Been using it for years, and I haven’t run into any issue thy would make me want to use anything else.
There isn't much tooling. The community is small. The spec effort seems to have stagnated. AsciiDoctor and related projects seem to move at the speed of what Dan Allen decides is most worth his time.
That said, I've been wanting to do more long form writing, and AsciiDoc is lovely for that, so I may pick it up again for that.
The implementation lacks checking, so for example if you have some text between square brackets, it will often just get dropped even if the contents is not valid as an attribute list.
{asterisk}