That's true, but this isn't one. This is what respectfully disagreeing looks like. Ad hominem would be "No, you're an idiot and people don't care what you think just because you disagree with choices they made". That would have been inappropriate.

The implication was there - that a point was made 'only' because of an os they didn't like. Its Ad-Hominem. It was pretty far from 'respectfully disagreeing'

That isn't ad hominem, though. An attack that implies personal qualities isn't the same as an attack on the person.

I think the point is that someone who is choosing an OS that is controlled by a particular company has chosen to trust that company.

It's "ad-hominem", but I agree.

"Ad-personem" and "ad-hominem" are equally accurate in this case, because it wasn't either.

I done goofed. I wasn't even aware what an "ad-personam" was. I found a related question on Quora and that explained it quite well I think.

Quora question: https://www.quora.com/What-are-concrete-examples-of-ad-homin...