I would humbly disagree.
My experience is:
1a. where I want a flat back position for fast and/or hilly rides less than 50miles = give me a long narrow saddle, virtually no padding.
1b. flat back riding position for longer rides = split rail, as my SMP
2. when I ride a more relaxed geometry road bike with taller head tube and less emphasis on aero - leather saddle with cut-out pleases me
3. for the vintage bikes = vintage leather saddles (mostly).
4. the beach cruiser = wide and padded.

but then if you line up my road bikes they range from 58-63cm ST, 56-59cm TT. Varying degrees of drop and reach.
just not a person who believes 'only one size' fits me.
not a person with a 'single riding position' of comfort.

edit: Every bike in sig line has a different saddle. The vast majority of my rides are sub-50 miles.
re-edit: now road shoes, I'm a bit pickier - Sidi's are my fave.