For a desktop PC owners - add a 128GB SSD with Win11, boot it once a year to run Turbotax. I've been living like this with Win10, while using Linux for everything else (Linux runs browsers and LibreOffice that can open office files). My other motivation was that my tax data are only accessible to that clean environment. Amazon sells a power "switchboard" with 4 buttons that control power to 4 SATA drives, in case you don't want to plug/unplug that extra drive.
OS is nothing more than an environment that exist to run applications. I'm only going to use Window when I have to run Turbotax. This way M$ will only see that I use Turbotax every April - good luck with selling that valuable data 🙂
