It would make it easier to know what features are supported, see linked thread. Before posting I’d initially assumed the extensions were supported, working out Scale was on 4.21 was nontrivial (but also not difficult, one shell command).
I would have saved time prior to the post by knowing the SMB version number earlier - your docs were the first place I looked.
This isn’t a complaint about being on stable SMB. There is absolutely no reason to rush SMB updates.