Soo.. who else is switching from 2×10 back to 3×9 / 3×10??

Meh.
I’m currently running;
1×1
3×8
1×9
2×9
3×9
2×10
All good.

It’s about the ratios you like though, not so much the absolute limits. I found a 44t a bit big, a 32t a bit small, and a 22t no real use at all, so found 28/40 really good! YMMV

I take your point, but you still have to use a wider range cassette, no? So more chain/ slap and bigger jumps. I find that 32 and 11-32 does fine of the time, with the other rings used for the fast and slow bits. So ironically, I probably have to change the front rings less often than if I had a double.

I take your point, but you still have to use a wider range cassette, no? So more chain/ slap and bigger jumps. I find that 32 and 11-32 does fine of the time, with the other rings used for the fast and slow bits. So ironically, I probably have to change the front rings less often than if I had a double.

Definitely agree, and I would see no point in going to a double. I now use (and prefer) a single, so it’s a bit of a moot point, but when I used a triple (not for 7 years now admittedly) I would be constantly flitting between the middle and the big whilst crossing the cassette.

Never found chain slap and issue, nor bigger jumps, I generally used 11-34 cassettes (with 9 speed), so a ring in the middle seemed to make most sense, with a 28 for steep stuff. I originally just used 32/44, which achieved little, other than making me MTFU on the climbs, then went to 30/42, then decided the 28 would be an idea for a 12 hour solo, and found I preferred the smaller rings.