My pothos finally decided to climb instead of trail, and I'm not sure if I should be proud or concerned

My pothos finally decided to climb instead of trail, and I'm not sure if I should be proud or concerned. I've had it for three years in the same spot and suddenly it's reaching up the wall like it's found religion. The new growth is noticeably larger too. I'm guessing it hit some kind of maturity threshold, but has anyone else seen this sudden shift in growth habit? Makes me wonder if I'm missing something about how long they need before they truly settle in.