I switch between MacOS, Window 10, and Linux Mint. In each case I stick with the defaults except for minor tweaks, where I keep a Markdown bullet list - things

I switch between MacOS, Window 10, and Linux Mint. In each case I stick with the defaults except for minor tweaks, where I keep a Markdown bullet list - things like switching on hidden files and file extension visibility, or installing obscure things like Rectangle and Silicon Info on the Mac, or where to get my favourite fonts from (eg iA Writer Duospace). None of that is time-consuming enough to script or otherwise automate. No need to sync anything, but to be fair I habitually reinstall the OS at least once a quarter so I'm pretty practiced at it.