I used it in ~2018-2020 on Slack (as well as waaay back on Campfire), and it was showing its age. The Node ecosystem, for all its faults, has come a long way since Hubot was created, and working with Hubot felt dated. I believe the original was written in CoffeScript!

That said, if all you want is a few quick scripts hooked up to chat, it's still pretty low effort. Alternatives require a fair bit more setup, and while they're better for it, maybe you don't need that.