ghost4man said..
I like the challenge of the much shorter SUPs which are plenty fun once you dial them in.
Me too, I sold my 9'3" x 27" x 118 liters (for my 100kg) noserider, I prefer my 6'10" (x 125 liters) for small waves for the acceleration, but I reckon most people have more fun on longer boards.
This said, I also sold my noserider because I found a 6kg 8'4" with a fast rocker and semi-pulled in nose & tail provided me nearly as much glide as a 10', and paddling speed to roam the coast, but still have fun if stumbling on a quality peak. A quiver is a nice concept, but in practice it can be a pain to get back to the car and change boards, so the more versatile boards are the ones getting more water time. Also since I surf beach breaks with 3 meters tides, peaks change totally by the hour, so I am a bit biased towards versatile boards.
10' boards are quite specialized tools, just like 7' boards. 8'x" seems like the "magic lengths" to have fun in all conditions.