Most software, but definitely not all. Steam, Resolve being the two biggest non-foss items on my desktop, while my ex-Chromebook has a proprietary screenwriting program, as well as OnlyOffice instead of LibreOffice because I need much better Excel compatibility for work and LO still isn’t quite there for it.
Phone android. But not entirely de-googled. Replaced drive with syncthing, keep with Joplin, photos, phone, and messenger with their Fossify equivalents and disabled the originals. Replaced gboard with heliboard, etc…
But can’t/won’t completely replace the OS yet because both google pay and android auto are essential to me and getting them working on most replacements is still a royal pain in the butt.
FOSS for everything on my laptop and server, except discord and Spotify, but I’m migrating away as much as possible. I have a Pixel 7 with GrapheneOS and use mostly FOSS there too, but have Google play installed to the sandbox for some social media apps. Not perfect but pretty good and improving
Arch on every box in the house, including the primary router. Mixed Intel and AMD. Openwrt on every AP (unfortunately Mellanox and MediaTek firmware blobs for the radios). GrapheneOS on my daily and LineageOS on my legacy phone.
Aside from occasional games, I don’t install anything I don’t have the source to. My phone is the only exception, for apps required to interface with the rest of the world.