+1000 = Big Ditto! I use high quality B&W and Hoya HD thin ring filters for all of my lenses.Even on my Expensive L Primes, I use the Top of the line B&W MRC Nano XS-Pro UV filters. Its simply superb.
I don't use them much myself ... but I know many do and swear by it. Is this because you feel there is no perceptible change whatsoever in high-performing lenses or you have made your peace with the potential trade off for possible protection? And, I did say "potential" trade-off.
I want to protect my front element from cleaning, scratching, chemicals, abrasives, small meteorites from space or anything else from touching it. A UV filter already saved my 24L II once and will continue to use them.
I cannot distinguish IQ loss from the filter, B&ws are that good.
Only difference is I will swap for a slightly cheaper Hoya filter on the 70-200 during swim meets due to splashing and I don't want the chlorine to damage a more expensive filter. One gripe I have with a nice B&W CPL I have is that it requires a hammer, vise or machine shop to remove.