I agree this is really sad and I also hope everyone affected finds a new opportunity quickly. CI is a commodity so it's hard for CircleCI to sustain as a stand-alone business. I found DroneCI to be simplest and fastest CI tool I have used. In fact just recently Harness published some bold claims of being 4x faster than leading CI vendors(https://harness.io/blog/fastest-ci-tool). I have been using it myself and it's faster. The benefit of having CI, CD, Security testing and governance features makes it a compelling platform offering similar to GitHub & Gitlab.