when to drop (or add) ppc support

### Your question:

The `linux-ppc64le` target platform seems to regularly require the most effort of all platforms to keep working, while also being the least used by at least 1-2 orders of magnitude. I've been frustrated by this, and have started to remove support from my feedstocks if/when ppc failures are blocking otherwise working builds on platforms where I know people actually use these packages. Since I'm not actually sure the number of users of my ppc packages exceeds zero, it starts to feel pretty bad to spend all this volunteer effort on users who may not even exist.

Is there any guidance for maintainers on how to decide if/when to support a platform for a given package, or drop it if it used to work but is now causing problems? And maybe how to best go about (temporarily) stopping builds on a platform? I know removing the `ppc` line from conda-forge.yml works, as does `skip: target_platform == 'linux-ppc64le'`, but I'm not sure what is best for bots and such, or if there's any information that should go elsewhere when dropping support, whether it's temporary, indefinitely, or permanently.