I am expecting delivery of an RST next week which will replace my 1986 Diamond Back Ascent, the DB will go to my son in law. My usual ride is about 20 miles each way, 3/4 urban, 1/4 country road. I do longer rides but not that often, but the DB was fine on 250 mile rides, averaging 80 miles/day. I am more of a fair weather rider - having experienced my share of riding in snow and sleet, I take my hat off to all weather daily riders - although the RST was bought in part for a bit more weather capability.
I average a steady 12 mph, with some moderate hills - I fall into the 'unracer' category and am using mainly normal clothes and aiming to arrive without needing a shower! Have reverted to flat pedals and work shoes. Let us not forget that when cycle touring took off the typical outfit was tweed.