I'm glad you mentioned private rooms in hostels. They are still a lot lot cheaper than the cheapest budget hotel and generally much more comfortable. I don't mind sharing a bathroom. I never have to line up for a shower or to clean my teeth. I'm in my seventies and and awake, showered and at breakfast before the younger ones wake up. I talk to anyone and find out some interesting things that you don't find in travel guides or on the internet. I can't stay in a dorm because I have a CPAP machine and wake up at 2.30am to write. I'm sure other dorm sharers would love that!