Most people are buying Nvidia because that’s what’s commonly recommended on reviews. “Want to use AI? Buy Nvidia! Want the latest DX12+ support? Buy Nvidia! Want to develop videogames or encode video? Buy Nvidia! Want to upgrade to Windows 11? Buy Nvidia!” Nonstop Nvidia adverts everywhere, with tampered benchmarks and whatnot. Other brands’ selling points aren’t well known and the general notion is that if it’s not Nvidia it sucks.