I have gone for 11 sessions of laser hair removal so far, across 14 months.
The first three or four times were done long pulsed because I have darker skin (I'm biracial, half-Black). For the fourth or fifth time I switched to IPL and that seemed to undo all of the progress of the previous 3-4 times as well as creating growth in spots where I've never had hair ever in my life (even before laser). Needless to say, we switched back to the long pulsed. However, between my seventh and eighth session, the facility I go to had upgraded all of their equipment, so for my eighth time I tried IPL again. No issues that time so we've been sticking with that since.
Anyway, I only have about 2-3 dozen hairs left. I stopped shaving for one month to get a better idea, and yes, I have few enough that I can count them. Nothing on my cheeks, barely anything on my chin, and most of what's left is immediately below my nostrils rather than my upper lip.
I will do one more session of IPL, and then I will be switching to electrolysis to take care of the stragglers.
I was assured over and over that IPL IS just as permanent as electrolysis by my technician. I told her over and over that I have concerns because I've read otherwise in countless places, but she literally guaranteed me. She even highly recommended that I go with laser OVER electrolysis, despite me saying that I wouldn't care if electrolysis was ten times more expensive and would take ten times as long if it was even just 1% more permanent than laser.
That being said, I do think she's wrong, but I don't mind going in as the hair slowly resurfaces if that does happen. At least it will only take a quick electrolysis session every few months to remove it instead of having to go in for hours every week!