CircleCI used to be an absolutely awesome way to set up CI. The default images just worked for the vast majority of cases. Sure, it always took a bit of fiddling with YAML, but IMO was way ahead of Jenkins et al when it came out.
Then they reworked their YAML format to enable pipelines (and make everything way more complicated, and break all our existing flows). Then they reworked their images to make them more efficient or something, but now there is almost never an image that has everything I need, so I have to build my own image in docker (with yet another CircleCI job). Now that Github Actions exists, we have been slowly migrating everything off CircleCI. Too bad they lost the simplicity that brought us there in the first place.
Then they reworked their YAML format to enable pipelines (and make everything way more complicated, and break all our existing flows). Then they reworked their images to make them more efficient or something, but now there is almost never an image that has everything I need, so I have to build my own image in docker (with yet another CircleCI job). Now that Github Actions exists, we have been slowly migrating everything off CircleCI. Too bad they lost the simplicity that brought us there in the first place.