The apostrophe is used to form the plural of lowercase letters, sometimes single numbers, and mixed-case acronyms.
The loss of the distinction between lose and loose is killing me though.
The loss of the distinction between lose and loose is killing me though.
You’re right that there are extremely rare exceptions (though even official sources like Purdue OWL and Chicago manual of style disagree on the finer points), but I will keep telling everyone you never, ever use it for plurality. I would be much happier seeing people type “there should’ve been WotLKs for users to choose between” than “I had three burger’s” on the very rare chance I see the former. I hope you’ll join me!
A bit off topic, but how would you react to her's or their's? Not real words, but the intention is clear, and possessive.