[lmm]

Having drivers in-tree is great, but a lot of drivers can't or won't be in-tree. My webcam (using qc-usb), PDA (using synce) and TV capture card (I can't remember what the project that supports those was called) all stopped working on Linux, even though the drivers were open-source and seemingly high-quality, because that's not enough for Linux - you have to be in-tree or you'll get broken.

[vetinari]

At the time when I had TV capture card (Hauppage PVR250; it was analog TV tuner with MPEG-2 hw encoder), it stopped working in Windows way before Linux: in XP, the driver installation was showing HRESULT errors, but once a blue moon it would succeed. Forget anything newer. With Linux, I think it should work with the current ivtv driver, but I don't have it anymore to try.

Another example are scanners. Does your driver for Windows use TWAIN? Well, then it won't work in Windows 10 anymore, which made WIA the only option. Lot of fun for folks, who were automatically updated.