Dealing with sewage is a huge pain in the ass - especially if you're in the northern regions during winter, finding a place to dump out can be a real nightmare (not to mention frozen tanks, etc).
Another thing people don't really think about is cooking - you can do it, but as someone who enjoys cooking I ate like shit a lot of the time because it was more convenient not to have to worry about prep on a tiny counter, cooking on basically a single burner (I have 3, but if you use one it covers the other two ️), and then doing dishes by hand with hot water you need to wait for.
Recently moving back into a house has made me appreciate a lot more of the little things like how I can just go jump in the shower real quick (and not bump my head while showering), easily get amazon packages, etc. Traveling was a whole lot of fun and definitely had its upsides, but it also has downsides a lot of people don't think about (or try to write off as not a big deal).