How about "I'm an long-time UNIX user, having used and worked professionally on SunOS, HP-UX, AIX, Solaris before "package managers" were a thing, have used Desktop Linux in many varieties since around 1997 (Red Hat, Corel, Mandrake, SuSE, Debian, and others (including brief stints with FreeBSD), am all this time using Linux professionally for server work (solely Debian, Ubuntu, and Centos), and have used Windows since before 3.1 was a thing, and I still enjoy my Mac more"?