I watched the live feed of the Fastest paddler on earth 200m sprint in Germany overnight and it was interesting to hear Starboard has a 21 inch wide sprint for their paddlers to use there. Also Fanatic had a 21 inch Strike. didn't hear a mention of other brands but I believe these weren't the only 2 brands with this new super skinny width.

Connor won the mens but he used the 23 wide model in the final.
Defending champ little Aussie legend Trev used the 21 wide model in the final and he fell mid way. Afterwards he said he learnt his lesson that he should actually practise paddling the board before racing on it as he found it tippy.
Aussie, Jake came in third on the narrow strike.

Both the sprint and the strike both look to have some changes for next season. Not sure if these 21 wide boards are production anyone know?

Times.
Final Mens
Connor Baxter :53.12 seconds.
Boris Jinvresse :53.60
Jake Jensen :53.83

Final Womens
Seychelle Hattingh 1:02.50
Manca Notar 1:04.70
Amandine Chazot 1:04.90

Note. Connors qual race was a head to head dash along side Trev.
Connors time was quicker than his final at :51.6 seconds against Trevs :53.4 seconds.
but still a LONG way off the world record held by Danny Ching in 2014 at :47.6 seconds... someone can correct me but I am pretty sure dannys time was on a 24 wide board and on his 404 design that is not a dedicated flat water board like the sprint or strike.
If Connor can't break the 50 second barrier I don't see anyone breaking Danny's record for a generations time.