CircleCI made great steps the last few years, f.e. to better support proper DRY working, supporting OPA policies-as-code, VSCode extensions with "dry-run" options.
To be clear, I do think CircleCI is a better product than GHA. I just think there's a lot of air sucked out of the room by GHA being available 'for free' and out of the box.
Also, honestly, I don't care about any of those features. The main thing I want is a CI system that is fast and customisable and that I don't have to spend a lot of time debugging. I think CircleCI is pretty decent in that regard (the "rerun with SSH" thing is way better than anything else I've seen) but it doesn't seem to be getting any better over time (e.g. caching is still very primitive and coarse-grained).
For some examples of more advanced usecases take a look: https://circleci.com/blog/platform-toolkit/
Disclaimer: i work for CircleCI.