But I'm going to anyway: I genuinely don't understand how CircleCI is still a business. Every major code repository provider has CI built in. All of the ones I've interacted with (Github Actions & Gitlab) are just as good as CircleCI and in some ways far better (e.g. there's a stellar community of Actions builders on GHA, that can be included with one line; CCI Orbs don't have nearly the same uptake). Pricing is all pretty similar. Some companies want to self-host stuff: JetBrains & Atlassian still own this.
Ultimately we left CCI because their stability was unacceptable. While its been quite a few months, their status page history even today showcases this well [1]; they legitimately have partial or full outages once every two or so weeks (and those are just the ones they tell people about; we regularly, weekly, saw build failures that could only be explained by "freakin circleci, just re-run it").