ParserAfterStrip and ParserBeforeStrip are now run back-to-back. Only one is needed. ParserAfterStrip isn't used by anything deployed by WMF, so let's kill that one.
Did you look at non-WMF use cases (via code search -- since that is the extent of what we are committed to looking at)? We cannot deprecate only on the basis of what is deployed on the cluster.
In general I try to patch up even undeployed users. In this case there is no loss of functionality at all, the combination of ParserBeforeInternalParse and ParserBeforePreprocess runs at exactly the same time(s) that ParserBeforeStrip/ParserAfterStrip would.