If you need a shower cap to shower more and comfortable then definitely get one. I never really got the point of them.

In my country we have hand showers or have a hand shower together with a fixed one in newer places. The only exceptions are public places like gym. So we don’t have as much of a need for shower caps, we can just not aim the water towards the hair. The only one I have actually seen in real life was one that came free with some magazine.