Classic Mac OS 7.5.3 -> 8.5 -> 9.2 -> Windows 2000 -> XP -> Vista -> 7 -> 8.1 -> 10 -> Pop!_OS (for a few years but eventually wanted a KDE based distro) -> Garuda Linux (for a few years but wanted to try out nobara for gaming) -> Nobara (for now, great for gaming, frustrating for programming because of package differences) and other unknown reasons)