There was a wrangle on Breakfast this morning, fired up by some council's decision to remove apostrophes from street signs. Funny, I thought that had already happened.
Anyway, there was the usual showpiece debate between a traditionalist bent on "rules is rules" and a progressivist "there are no rules only conventions" (of course, my take is "conventions is conventions"). The progressivist claimed apostrophes do not get pronounced - this may be true, but is irrelevant.
What I found more interesting was that he also said the conventions about apostrophe usage had already shifted away from using them in plurals - I was not previously aware that the Grocers' Apostrophe used to be 'correct' at some period in history (although I like to use them when expressing the plural of a character symbol, eg "there are four t's in this sentence" - imagine the trouble I had with iOS on that!).