Same, but ~2007 for me. I switched when Windows crapped out on my rented computer at school and Linux just worked. I’ve been essentially Linux-only since then, with occasional returns to Windows for one-off tasks (e.g. play a certain game with friends, run an app, test something, etc).

The only time I’ve booted into Windows in the last year was to install Minecraft Bedrock edition so my kid could play with his friend, but his kid flaked and we haven’t been back since.