Lacking a good set of semantics for removing multiple affixes at once, we shouldn't rush to guess what people want. You don't even know what behaviour YOU want, let alone what the community as a whole needs.

This is both dumb and dishonest. There are basically two choices, both completely clear. I think the more obvious one is to treat several prefixes or suffixes as substring class, much as .[rl]strip() does character class.