I had it myself when I was 16 and it wasn't quite the same, but for me they had to take a lot of cartilage . I played football at the time and missed five weeks total but that was because of the severity. But, like you said, once it was fully healed and with a sleeve, there wasn't anything I felt I couldn't do at the time. Heck, I was able to walk out of the surgery with no crutches or cane, and I went in wearing an immobilizer with zero ability to put weight on the knee without it catching and collapsing.
Unfortunately as decades went along it has given me a lot of long term problems, but again, that was just because I tore it almost from the front to the back.
From what they've said Gallup's a lot less severe than what I had.