Same here! When I started off in the UNIX world, the shop had a collection of AIX, SunOS, Solaris, HP/UX and Digital UNIX. the x-hack was standard form and I s

Same here! When I started off in the UNIX world, the shop had a collection of AIX, SunOS, Solaris, HP/UX and Digital UNIX. the x-hack was standard form and I spent a few years fixing errors with the x-hack (or converting the scripts to Perl). It is just second nature to use the x-hack in if's and case statements on this point. I have to try really hard to NOT use it. Of course, the folks with less gray in their hair and often confused by it, referring to it a "Olde Unix." I have approved plenty of PRs with the comment, "Updating mek's Olde Unix syntax."