On my way to Green River last week, I was very surprised at the countless number of vehicles passing me (from both directions
) that had roof top tents on them. It seemed every 20 cars or so, there would be one with a roof tent on it--and not all of them were your "standard overland" type vehicle. Lots of stock 4x4 types, and a handful of subarus as well. Def seem to be becoming more mainstream...
Having had two different rooftop tents and spent a handful of nights both in them and as well without them, I can safely say, the rooftop tent is def a great solution for my camping style, especially when I've got my smaller kids with me. My first tent was one of the cheaper ones being offered several years ago, but by a company that had made a decent name for theirself after a couple years (Camping Labs, which has since gone out of business...). It was an ok tent, and not really knowing anything else, I felt it was fine for me. I sold that one and then a couple years later bought a slightly used ARB tent. That tent seemed MILES ahead in structure and material than what I remembered my first tent being. I have no doubt that if compared side by side, and used the same amount of times, the ARB would have no doubt beaten the camping labs handily.
I agree that it can be a good deal more money up front for the larger, well-known, established brands tents, but, if you have already figured out whether or not a roof tent is actually for you or not, then you will most likely be able to see (like I figured out) that paying a bit more for a quality product--and with an established company that won't just be disappearing after a year or less--is absolutely worth it in the long-run.
I am currently without a roof tent and I have been finding ways to continue to camp, but they are not my favorite, most convenient ways, and will be getting back into a roof tent setup asap.