Some of us can’t just “select a different frame”! Although if I had budget, space, and the blessings of my cyclist wife, a custom frame would have a shallow ST.
My asymmetric rear demands a leather saddle (love my Berthouds!) if I want to be comfortable for more than 30 miles, and my long legs like it set well back. Here are my “wild-offset seat posts”. And yes, Berthoud saddles allow one to sit farther aft without actually sitting on rivets as on Brooks of my experience (Team Pro, B17, Swift).

Early version of VO’s long setback seat post (only comes in 27.2mm) on the Marinoni, showing my asymmetry:


Truvativ 26.8mm in Miyata 912, which also has since gotten a Berthoud:

BTW, that Ti-railed Rivet Independence saddle on the 912 has a bit more setback than a Brooks, and is no longer in use...