So many people dismiss Tcl as near garbage, but Tcl/Tk applications written more than 20 years ago still run as intended including GUI, and they run on Linux, Windows and Mac. You just install a new --or old, whatever-- version of Tcl/Tk and the scripts will run, agnostically. I have a few I made myself 15 to 20 years ago and at least with those I never have to worry about distro upgrades, repositories or libc version.