Pretty much every device is supported under Linux once one avoids the very latest product. I'm not talking about using Granma's 286, just don't buy the latest hardware or anything younger than say six months. Hardware manufacturers are encouraged (just to say) to support only Windows out of the box, therefore Linux support requires either personal unpaid work by members of the community or investment from FOSS companies, which for obvious reasons needs more time.

One extremely important aspect of Linux support is that once it happens, it stays there virtually forever: there's no such thing as declaring a product obsolete so that users are forced to migrate to the newer version. This applies to software too; WINE allows Linux users to run perfectly good Windows software that stopped working on native Windows ages ago forcing Windows users to shell out a lot of money.