I buy whatever I want...
And many do, I know.
Then there are students on a budget that can not do this of course.
Does that mean I change gear every year?
No way, kitesurf gear does not get better, so use it till its worn, and change the worn sizes.
Or if something much better pops up, but happens so rare.
Getting to know your gear gives so much more performance than new gear
Then we have had the hydrofoiling since 2012, where there was a lot of development in the first years - and then it stopped and almost went backwards to the start, in terms of wavefoiling.
Nothing new here the last many years either, so for starters really expensive, but no reason to change gear now.
Wingfoil is a new sport, and some faster development here yes.
Then again, many principles are well known from kitefoil, so not really new things regarding the foil itself.
Boards get shorter and thicker, but thats about it.
Also, wings and wingfoil boards are pretty lowcost compared to most other wind gear sports - so not much cost here.
Meaning, the yearly cost is not that much, new warm wetsuits every second year or third is of course needed, and much more important than getting new gear IMO.
When you have been into all the windsports for many years, you know what works for you, and what dont - so you only get new gear when your desired gear/suit wears out, or something really changing level, or if a totally new sport comes along, to extend your horizon as a waterman (or woman)
The only thing I dislike, and dont do, is keeping gear I dont use.
So either give it away, or if newer, sell it.
One should only have gear that is ridden/used regularly