or other people found them annoying

There must be a market for pants that have room for this.

Or they found a girlfriend and can finally take full advantage of them!

You're taking about slightly different things - you about ED, the other person about "boner all day". They are not the same thing.

Slightly off topic, but this is why I don't really trust these "no tolerance" claims. That claim is usually very specific, while people's understanding of "tolerance" is often quite a bit wider.

I take 3 medications which each make "no tolerance" claims based on scientific studies. But my subjective experience is that all of them do build tolerance in some way - the subjective effect does wear off with time and taking a break does reduce the tolerance. One possible cause is mistaking the intended effect (ED) with side-effects (boner all day).

The first time I took sildenafil I had a bad headache and nausea, the next couple of times I didn't suffer from nausea and the headache wasn't as severe. I don't suffer from any side effects now other than my nose getting a bit stuffy every now and then, so in that sense I developed a tolerance to the medication's side effects. The boner effects still work just as reliably as day one, no tolerance development for me there.