Via Twitter, regarding my earlier post about ksh and csh in the BSDs:

@Rubenerd About your latest article on #NetBSD csh; tcsh (and csh) in #FreeBSD is quite a bit different: It’s really both tcsh (ie. same exact binary), it’s got a lot of fixes, coming from the canonical upstream github.com/tcsh-org/tcsh as indicated by psrc/contrib/tcsh/README.md