I now have gotten in quite a few rides in the new Assos Equipe RS S9 bib shorts. https://www.assos.com/equipe-rs-bib-shorts-s9?quantity=1&g=equipe-rs-bib-shorts-s9_blackSeries-1-M.jpg&color=113
I have found them excellent and the best Assos bibs I’ve owned to date. I’ve used them on my road bike, on the trainer, and also for XC MTN bike riding, and have been very good for all of them. You really don’t notice the shorts when you ride, which to me is a very good thing.
I went ahead and ordered a pair of the new Cento Evo Bibs, which are an update to the old Cento S7. CENTO Evo Bib Shorts, blackSeries » ASSOS Of Switzerland They just arrived today so haven’t gotten a ride on them yet, but they do appear to be fairly similar to the old S7 with some new materials and different leg grippers. I like the thicker pad for long endurance rides on the trainer as well as long slower paced rides outside.