SUP will not go down the same path windsurfing did, it will last. Simple as that. Too many great companies out there to let it do the elitist path that windsurfing took. gear that only pro's could get the most of and just way OTT for the average sailor to have fun on.
So many positives with SUP being easily accessible for everyone, you can choose what path you want to take, be it waves, racing, flat water, exploring, mucking around with the kids or just cruising by yourself.
Companies like Naish, *board, Fanatic, NSP etc are in for the long haul. Can you imagine someone like Robby Naish letting his company become elitist and so high end that the general public goes "Bugger that, too much effort". Windsurfing did, its come back in a good way but doesn't have the participation SUP has now or will ever have. I could be wrong but have been around long enough to see what windsurfing went through and Im sure the industry wont let that happen again.
I love both sports, windsurfing for a very long time and SUP since my 50th. We are very lucky!!!