"It seems to me that the infamous pro sport has fallen out of favour within the springer community"

Not out of favour with me. If I didn't already have one I would definitely buy one. That said, I also prefer the original stock design.

Future generations may well note it as a 'classic' but a classic that combined looks with excellent performance.

Bear in mind things also seem to go in cycles: what appears to be out of favour today will undoubtedly be back in favour at some point in time.