Honestly I’ve done mostly forgot, and with the proliferation of AI technologies and all the typos AI has read from in the training models, I bet AI isn’t always right about this either.
I usually just don’t care anymore, whether the autocorrect puts the apostrophe in or not.
I do. But only because it is burned into my memory. When I was in college one of my professors got really angry at our entire class because nobody knew this grammar rule. So he explained it, and for some reason it stuck with me.
But to your other point, yes, autocorrect often gets it wrong. I’ve had to remove the unneeded apostrophe on the possessive ‘it’ so many times.
π is burned into my memory, up to 50 decimal places, since age 10. So is the alphabet backwards, since age 10 as well.
But when you see typos going on for 30 years regarding a simple apostrophe difference, you might start to forget which way is correct.
It’s about as important to me as which country uses a dot or a comma to separate thousands…
$1,000 … £1.000 … ???
You forget about us space people! 1 000 $. Or 1 000 £.