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Linux really has come a long way
(lemmy.dbzer0.com)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
A lot of hardware has first party support
But plenty doesn't e.g. Broadcom wifi cards. If you just buy whatever new hardware and expect Linux to work out of the box, you're likely to have problems ime.
There are always options of course, but you have to shop wisely!
Broadcom hasn't made laptop WiFi cards in a long time.
Ok, fair cop, I'm misremembering things — I had issues with a realtek card recently though. The point is that, as good as first party support is these days, you can't just buy anything and expect it to work, especially if it came out in the last couple of years.