I don’t see how it would be any quicker than changing the whole ring on a cinch system.
Several small bolts to undo instead of just the cinch ring or whatever it’s called.
Also £80 initially and then still 40 for every ring size.
I don’t believe people change cranks that often to warrant something like this (i.e. don’t need to keep changing the spider often) and are cinch rings not about 40 quid anyway.