10 speeds are definitely enough (assuming a double crankset). Even 9 cogs in the back is adequate for me, and that includes riding some substantial hills. The only thing having 10 speed on my road bike has done is give me two cogs, the 12 and 11, that are so rarely used that it’s a waste. I recall an old Jobst Brandt quote that it should have stopped with 8 cogs since having more made for weaker wheels and tolerances were such that longevity of the drivetrain was compromised. I’m kind of in that camp too.
Last edited by Point; 12-05-21 at 08:32 AM.