COMPAT_43 users?

[Mark Johnston]

The COMPAT_43 kernel option, which enables syscall support for 4.3BSD
binaries, hasn't been enabled in the standard kernel configs for well
over a decade, and doesn't appear to be a dependency of any other kernel
features.  Nonetheless, the kernel contains quite a bit of code to
support this option.  Does anyone use it in modern versions of FreeBSD
or have any arguments for keeping it?