Depends on what market segment,
I think for average people who don't surf or ski probably not, there board shorts are pretty expensive for just a day on the beach but if your surfing they are great and worth the money, ski gear i have never used them so i don't know how good their quality is. their wetsuits are also epic.
The two other things i think that make them super relevant in the surfing world is their pro team and their events.
they sponsor Taj Burrow and Joel Parkinson for the contest crowd and Rasta and Donovan Frankenrieter for the soul surfer type, plus sponsor a whole lot of juniors. their team is obviously alot bigger then that but these are all household names, at least in australia people who don't surf has heard of taj and Joel.
As for their events, everyone has seen footage of Teahupoo, plus sponsor rio, jay bay and pipe masters.
apart from Rio they are all huge events probably the biggest of the calendar, they also run the junior would champs.
so yeah i would say still relevant, maybe not to mainstream fashion surf wear has kinda died down aloy, but as for their influence on the surfing world i think they are still super relevant.