I think this is a hard question to answer, because everyone values different things and will therefore have a different answer. I wanted to clarify a few things on behalf of Cedrus since the video was shared. Yes it was the most expensive, but it was also the fastest and stiffest. We have worked very hard to make Cedrus not just universal, but actually higher performing than OEM masts.
If you are on a budget, and define "bang for the buck" in terms of $ spent/foiling obviously you cannot beat a good aluminum mast. A nice aluminum mast like Axis 19mm or the Cedrus aluminum are just as stiff as many expensive carbon masts, at 1/4 the cost. If being compatible, universal is valuable to you, then the Cedrus would be a better option than Axis, but it is more expensive. If you like Axis foils (we do!) then no need for a Cedrus. Simple.
If you value lower drag, or more stiffness, or ventilation resistance, then moving to carbon makes sense, at a high cost. But make sure you get a mast with good design that IS actually less draggy, and/or stiffer, less prone to ventilation. Don't just assume more $$ = better. A lot of these carbon masts with long chord lengths have a lot of drag, especially when ridden low in the water. They are also quite heavy, if that matters to you. I believe we have reached a point in the industry where masts should be discipline-specific. Just like you have high speed foils and low-speed, a mast can be optimized too. A high speed race mast is not going to be good in the surf. So make sure you understand what you are looking for in a mast. Is it speed? Glide? Stiffness? Weight? Those are all competing objectives, which is why we offer two different masts now.
As for corrosion, when cared for, Cedrus can last a lifetime. If you do live on the beach and like to leave your foil assembled on your porch, then mixing aluminum/carbon can promote corrosion. But as long as you remove the carbon fuselage from the mast/adapter when not in use, corrosion cannot occur with the mast. It's really simple. So if you drive to the beach with your foil dis-assembled, it's really no different from any other mast. We have less than 1% warranty rate over 7 years of production, and can easily repair masts. So if you value TIME, buying one mast over a 5 year period is a lot of value / "bang for the buck." Many of our Evolution Launch customers have been riding the Classic for 2-5 years now, while many others may have bought 3-5 masts in that timeframe.
In closing, I would also be very careful with 3rd party adapters that connect to masts via M6 hardware. We have been designing/making/supporting adapters since 2018. The only lost foils we've ever seen are those which couple to the fuselage with M6 hardware (
projectcedrus.com/general/hardware/). We've never had any lost foils due to the adapter. The new Evolution masts use not only M8 hardware, but additional 10mm stainless pins to further manage the loads and provide a stiffer interface.