Condensation in a tent can be problematic if your tent is small enough that you are frequently touching the inside of the rain fly.

The tent in the photo below, I bought that about seven years ago, a single wall tent, the roof and ceiling are one sheet of silicone impregnated nylon. The tent is rated for two people based on floor size, but I think it would be a disaster with two, you would constantly be rubbing on the ceiling if you were on one side of the tent. But, for solo use, I find it works great because it is light weight and I can stay in the center of the tent, there I can avoid touching the condensation coated ceiling.



It is tall enough near the door that I can sit upright and not be pressing on the ceiling. Same tent below. I think this tent is no longer in production.



The tent below is my tiny tent for backpacking, that tent is small enough that I am constantly touching the ceiling, so I am happy to have a netting inner tent that when I touch that, it informs my brain that I will get wet if I push a few inches further.