I run all Linux at home (and LineageOS on my phone). For things like this I keep an old Windows laptop (Core2Duo) in the closet. For IOT/app-based stuff (none are mine - they all belong to my parents/relatives), I have my brother's old screen-shattered iPhone.

For documents I just use LibreOffice and suffer; if I absolutely need Office I suppose I could use my old discs and install it on the Windows machine, but have not had any need to in the past 3 years since I switched. When I send documents to people I just export as PDF and they're none the wiser.

Save for extracting BIOS updates from custom .exe files (thanks HP and Dell) I never use either of them.