Hills, especially the long long slightly inclining ones are no longer the source of pain and annoyance.
I sometimes even use TURBO to raise a smile.
Plus it fills a couple of boxes in being a 29er full suss, which is my first 29er after decades of riding a 26" hardtail
1'm 69 and 18st (115Kg) and have an arthritic right knee that stops me walking too far, the pain prevents me from doing enough walking to keep the joint mobile. However, on my electric bike the knee is fine, maybe because its not supporting my weight. I ride up to ten miles a day which give my knee plenty of excersise and its also very good fun! I bought the bike because of my knee and its been a great success.