Those valves are nice addition to an already good fork. They are not a must have. In the 2021+ chassis there is also a new channel on the backside of the lowers which allows oil circulate better up to the bushings. And the Grip2 Compression damping is also a vvc type in the newer version which changes damper characteristics and problems some users had with the former version.Looking at Fox 36 forks. I see the new ones starting from 2021 have bleeder valves in them. The older versions tend to be on sale but the "bleeders valves" on new forks keep me from buying. Do I really need those bleeders? Thanks
With all that said, if you are on a budget, the former version is already a very good fork.