I am old and I ride a few hills. First road bike had a triple and I used every gear. Subsequent bikes have had compacts and Wheras 30/26 used to be the lowest gear on the triple- I now use 34/27 on the same hills and don't find them any steeper. But definitely easier than 39/27 that I did try once.
But if changing from Double to triple- you may need a new F.D. and make certain the changers/brifters can take the extra shift.
__________________
How long was I in the army? Five foot seven.
Spike Milligan