Buy an AMD or Intel GPU. They're cost-effective (or non-negotiably bundled, sometimes), they're well supported, and the vendors make a considerable effort to en

Buy an AMD or Intel GPU. They're cost-effective (or non-negotiably bundled, sometimes), they're well supported, and the vendors make a considerable effort to ensure that stable, compliant drivers are available on every major operating system, and that the free ones are no less stable nor any less compliant. AMD's performance is competitive dollar-for-dollar, and the top of their lineup is about 80% as good the absolute highest-tier competitor most of the time.