I had a TURP at 50 in 2018. The Op was fine but my stay in hospital was extended from 3 to 10 days thanks to sepsis. That enforced rest probably helped and prevented me from overdoing it as soon as I got home.
The whole process was kicked off by an ultrasound scan which showed my bladder was at 2.1l capacity (3x what it should be, male avg. is 700ml) and the Ultrasonolgist is still the only person who's ever said "would you look at the size of that!" to me and meant it. Despite the highly stretched nature of my bladder, I wasn't feeling the urge to pee and was only emptying it by about a third each time.
I passed the TWOC (trial without catheter) at the end of the hospital stay. The only issue was that because I went straight from theatre to being diagnosed with sepsis, they left the larger surgical catheter (the one where the tools go the other way) in situ for 9 days and it dried in place. It felt like everyone in the hospital had a go at removing it at the end of my stay, culminating in the consultant distracting me by joking about removing kids' wobbly teeth with a string tied around the door, while simultaneously yanking as had as he could to remove the bloody thing. Forget childbirth and scotch bonnet chillies - that was top tier pain!
Recovery period once I was back home was basically a couple of weeks of taking it easy, and easing myself back onto the bike: cutout saddle being an absolute must. I'd never really had to listen to my body prior to that - we're indestructible, right?
No complications since then however - everything still works as it should and I went from 'old man's dribble' to 'could cut through concrete' through the process. 5 years later and it's still the same.
It was only afterwards that I realised the quality-of-life improvements that came from it. (Notwithstanding the fact that had I left it, it would have distended and burst so I felt lucky to be alive!) I realised I'd been planning my day-to-day activity around the availability of toilets and thinking strategically about everything. That completely evaporated and it felt like being a teenager again. Quality of sleep too - not had to get up in the middle of the night for years