I ride a vintage road bike and a MTB/hybrid on the same hills. On my 1987 Cannondale double, I do sometimes wish for another cog or two on the steepest bits. If (when) I get a new bike, I'll get a broader gear-spread. But that said, I NEVER use the smallest gear ring on the hybrid on the same route. It's a 22 front, with 11-28 in the rear. The middle ring is a 32 and that, plus the middle of the rear range, is as low as I go, and is essentially a gear or two lower than the lowest on the old retro road bike.