I'm motivated because it's a really novel set of things to work on with the tools of technology.

There's a TON of financial gain to be had, and I am incredibly bad at actually harnessing that because I'm too obsessed with silly details rather than user wants/needs. But it's a balance of keeping myself happy/learning and having cash, and I'm OK enough on cash that I do this to keep myself happy and learning.

Adoption is... decent? One of the interesting parts of this is that I will really never know how many people are using it because a lot of people will take the project, implement something, but definitely not post it to somewhere like github. And really, that's fine. There are games using the library on Steam right now, a few commercial systems that use it, and I get lots of reports from independent developers doing different things with it, so that'd good enough for me.