I've been on flats for quite a few years now. I ride them on my gravelish bike too. They let me to move my foot farther forward than clips would usually ever allow. I'd say on 70% of my rides I think about clipping back in at least once. However, it's just a momentary thought to which I won't really listen to. I could use some new shoes though...
In the past I have ridden several versions of the winged Ergon grips. I found them to be very comfortable on flats and uphills, but I felt that on the downhills my hands would sometimes feel like they were getting bucked forward. Maybe I could have rotated them back a bit, but then they might not have felt right on the flats/uphills anymore. Anyone else have this kind of experience?
I have only a single ride in on my new SQLab 12* bars and 10mm longer stem. I liked it a lot, but again the sample size is super limited. I'm using some Ergon GE1 grips until I dial in how I want my bars rotated (they may already be fine), and then I have a new pair of medium SQLab 711 push on grips to try. Looking forward to tying them out!
It's too bad this topic isn't getting many comments. LOL! I have (gasp) 4 clamps. I'd love a cleaner setup, but don't really feel the need to go out of my way to make it happen. However, the most frustrating thing about my 4 clamps if that I can't always get the thumb controls where I'd like them as far as reach goes. Any 2 clamp solution for me would probably require side-to-side reach adjustments too, because otherwise the controls might be closer than I'd like. With 4 clamps, they are sometimes a little too far. I guess I have tweener thumbs.