Certainly! Unfortunately, Tree-Sitter for NeoVim was merely a thing at the time this hack was written (3 years ago). Worse, it wasn’t available for old Vim, and (I haven’t followed the news but) I don’t think this has changed (I’d be curious if you have pointers; I found this discussion from last year, in which alternatives are considered but there no conclusion is drawn).
Sadly, old Vim is likely to stay around (and it is apparently taking great delight in diverging from NeoVim more and more… grmbl).