The UFO and Rocket each bring something new to the market and might get more people out (although there is a learning curve with the UFO.) The Sol is just a Sunfish, so unlikely to grow the market.
What MIGHT grow the market is something like the Sailing World boat of the year...
So far the only boards allowed are Intensity/Pimental and maybe the Aerosouth knockoff - Aerosouth’s initial board is definitely not allowed. The only knockoff sail that is comparable to a SF racing sail is the Intensity. The others are on the flat to very flat side. Per the above...
I sail Sunfish a lot, and as far as I know there are no Sunfish Direct parts that are permitted. You can, on a temporary basis due to the lack of LP parts, sail in Worlds qualifiers (as long as it is not the NAs or Nationals) with Intensity sails or Intensity boards, but you won’t qualify for...