>Low commit count also suggests unresponsiveness

SolidJS (Ryan mostly) is very responsive, so the low count is more a sign that there are not many issues which require code changes in the first place. Which is good!

>Sometimes a new maintainer will take over, but it's rare.

SolidJS really doesn't need a full-time maintainer at this point. One or more community members fixing severe bugs and keeping it up to date is plenty enough.