GB did better than expected all things considered. Rowing was a big disappointment, and athletics could have been better, but overall we had some gold medals come that weren't really expected, and our teams did well in Sailing, Modern pentathlon, BMX Racing, BMX Freestyle, and Equestrian. Each Olympics is expected to be the one where we 'drop off' from our London 2012 'bounce', and it keeps not happening. I predict that at Paris 2024, we are told that Britain will have a medal target of 40 with 12 golds, and then get 60+ again.
Coming 4th in the medal table is very nice - I can't imagine Japan go anywhere near as well as they do in 2024, especially with Baseball/Softball and Karate gone. Their wrestling and Judo teams won't repeat the performance in Paris, I'd imagine.