I have been using aText https://www.trankynam.com/atext/ since TextExpander went to the subscription model. I find Keyboard Maestro isn’t great since it doesn’t recognize word boundaries.
Do any of the alternatives do things like fill-ins, etc.? Or are they purely expansion of simple snippets?
I’ve discovered that I often end up paying for my aspirations rather than my actual use. I like to think I need (or will need) all the features of TextExpander, but I’m pretty sure I don’t (and won’t). Sometimes I think it’s worth continuing the subscription as self-encouragement to implement those extra power-user moves, but eventually there comes a time to reconsider. I think I’m reaching that point with TextExpander.
If that’s the case, then I think TextExpander is really your only option, if for no other reason than some apps have TextExpander integration, and I’m not sure of any other similar apps that have such integration.