Just because you publish a table with a rating for a N17 at Beaufort 4 does not mean that you have data (100 qualified races of a fleet of N17s racing against a fleet of yardsticks, (Hobie 16s and F18s). However a table with ? Holes is not useful. Behind the scenes, all race data are tabulated by wind speed (each Beufort number) and boat class. The software calculates the DPN as a weighted average of all the windspeed ratings and I think amounts to 70% of the B4 rating. The wind tables were generated with fixed percentages when needed because a table with holes is useless.
The committee split out B4 ratings for multihulls and not dinghies for a reason. Newer multi designs flew hulls much earlier then older designs. Of course dinghies are either on plane or making a big hole in the water from B4 on up. Now, the latest cat designs are even more efficient and some boats are flying hulls in B3. But Once again... you need a TON of data to have a valid ratings table... and that just doesn't exist.

Second point. Handicappers have found that Users, both sailors and organizing authorities hate the complexity of multiple number handicaps. Often, their favorite scoring program won't easily manage a matrix of ratings. Race committees are not good at determining a SINGLE Average windspeed for a 45 minute race... (oh... the wind was 6 to 12 over the race... well... that data can only go into one bin... B2 or B 3) Only the good pro's record this data during a race to have an actual objective basis. .. Texel published two ratings for their table for one or two seasons; Trapezzing and non trapeezing conditions. Most euro clubs did not bother and used the single number rating. So... they went back to managing the wind speed with a single number rating.

Next point, the precision by which two boats are scored on the race course is very different between one design and handicap racing. You can win a OD race by a boat length... In a handicap race... the difference between them is lost in the noise and they would be tied on points. That's why it is silly to use a timing system with 10ths of seconds measured and you truncate the rating.

Moreover, Handicap ratings can't resolve finish positions any finer then the noise added by the racing rules of sailing of the game. So, take a fleet of 10 identical boats 30 feet in length. 10 get perfect starts on a square line. One goes off on port and the rest on starboard. At the weather mark... 9 30 foot boats will have right of way on the single port tacker. that means he will be 270 feet behind... depending on boats speed, x amount of seconds behind... his sailed rating will be slower then the other boats. Bottom line... He sailed perfectly but NOT to his class rating... he really should be tied for first in handicap world and he is actually last on the water. Basically this looks like noise but is really just a bias in favor of boats on starbord. It takes a lot of qualified data to average out all of the sailing noise from the bias in the data and you still can't get around the bias for starbord around the race track. Bottom line... handicap is not as precise as one design and determining a rating table can only be an approximation with limited resolution.

The good news is that most racing does not require that much precision. Even in a one design race of Olympic sailors... Identical boats will finish 10 minutes apart on the race course... translation the winner sailed their boat to their rating... eg 65.0.... the last place boat sailed to a rating of 80 or higher. Rut ro! ... You can't expect more from a handicap system rating different designs.

Measurement systems take wind speed into account with their righting moment factor. (I don't know the specifics off hand).
DPN Portsmouth takes wind speed by biasing the rating to the B4 condition.
Portsmouth Tables of ratings for windspeed attempt to manage windspeed directly .. however, YMMV as to how good the basis of the table actually is for your fleets.

Personally, I used to think that wind rating handicaps help the game of racing because every sailor has a story when at some windspeed a boat class just flies a hull and leaves the fleet behind .... The idea is that the RATINGS should reflect this reality. One more knot and the fleet can fly a hull and ratings work again... The wind ratings were an obvious recognition of this realty. I liked using wind ratings to pretend to solve the issue AND I thought the time was coming to have rating for B2 and B3 split out.

When I relaxed a bit and take handicap for what it is... we are probably better off with a single number system that manages the non linearity internally. This is the approach of SCHRS and Texel.