I just ran some massive tests on our own CI. I use AMD Turin for this on gcp, which was noted as one of the fastest ones in the article. The most insane part here is that the AMD EPYC 4565p can beat the turin's used on the cloud providers, by as much as 2x in the single core. Our tests took 2 minutes on GCP, 1 minute flat on the 4565p with its boost to 5.1ghz holding steady vs only 4.1ghz on the gcp ones. GCP charges…
This is basically the premise of https://www.blacksmith.sh/ as far as I know, though without the need to host the hardware yourself and the potential complexity they comes with that.
Similar lower specced machines that were closer to the public internet had boot disk failures, but I had a few of them, so it wasn’t an issue. Spinning metal and all.
One of the db servers dying would have required a next day colo visit… so I never rebooted.