Yea, mainters also modify X-sofware, backport it, compile with different than tested compilation flags, remove patches they don't like, don't upgrade software for years or decades. Remember the time xscreensaver author asked Debian to remove it from their distro, added warning in GUI saying
_("Warning:\n\n" "This version of xscreensaver is VERY OLD!\n" "Please upgrade!\n" "\n" "http://www.jwz.org/xscreensaver/\n" "\n" "(If this is the latest version that your distro ships, then\n" "your distro is doing you a disservice. Build from source.)\n" ),
YES, THAT WHAT USERS WOULD SEE, if only Debian maintainer haven't removed this patch.
jwz.org/blog/2016/04/i-would-like-debian-to-stop-shipping-xscreensaver/