OpenBSD has always had a strong focus on protability. It's just the focus on portability was never restricted to "modernity" for the reason that there's few interestingly different processors anymore you can compile against to check for breaking errors.
It would be interesting though if Bitrig became sort of a DragonflyBSD for OpenBSD, where weird experimental stuff can be tested in a separate playground.
This is a problem, because what makes OpenBSD so smooth is testing on the weird legacy architectures like VAX. With a number of the changes on their roadmap I wonder if maybe adopting DragonflyBSD or FreeBSD may have been simpler.
Depends on how much the tumor mutates down the line. Most immunologic therapies and actions are based on specific markers antibodies can latch on to to mark cancer cells for destruction. With Cetusimab (generic name) you are already on a sort of immunologic treatment. It's a chimeric monoclonal antibody doing its antibody thing. Just taking a wild stab out to left field, the skin component of your reaction might be related to some sort of allergic-ish reaction to the mouse component of the cetusimab.