On the far opposite of the startup post company gobble up side - I've been pleasantly surprised how well our zSeries ran OpenShift k8 images for our inherited mainframes. A simple tune for s390x JDKs, and many of the Java based apps were off to the races. The hardware already was - so the cost of putting it to work ended up being cheaper than using cloud resources. The IO, as one might expect, is very solid. Loving the hardware we had was a less bitter pill than pushing out our own instances.

After noodling out how to make my docker images work on aarch64 and amd64, it was trivial.