I prefer playing full matches and have no problem with finding the time, court reservation or fitness to play three sets. Older players haven’t had a problem playing full matches in more than 150 years of tennis history and I don’t know why it needs to be changed. I stopped playing USTA tournament tennis after they went to the Fast 4 format and will have less interest in playing leagues if they mandate 10-point TBs instead of 10 sets. I can find social matches every day at my club to play a full match format and that is what I typically do.
i appreciate you want wear down your opponents after 3h (ie. that's why 5set GS's are harder to win than 3set tourneys), but court time is limited unfortunately. are you matches lasting 2+ to 3h?
i like playing 3 sets when not under time pressure (eg. someone waiting for the court)... but i typically have to start at 6:30-7a on a weekend to fit that in (ie. public courts by me start getting queues by 9:30-10a). no way i could reserve 3h at my club.
side note: club is clay, public courts are old beat up hard courts (read painted cement).
regarding usta, 2h is the "norm" for court reservations (ie. clubs with lights, else sunset in the best case is ~8p (with a 6p start - our matches are typically weekdays due to private club court availability - or lack thereof on the weekends))...
when my matches have gone to 3 sets, for sure it's well over 2h.
heck i played a match that ended 7-6, 1-2, and that match took 2h (before sunset, and didn't have lights)
so how do you solve for that... unless you own a bank of private courts with lights or something?