Interestingly enough, Kagi has a new browser, Orion, that's also WebKit-based. Besides the obvious macOS, it's in Alpha for Linux and "in development" for Windows. May the best non-Chromium browser win!
Kinda interesting that they were able to resurrect the WebKit engine on Windows, might have been quite an engineering feat. In the past (2007-2012) Apple distributed a Windows version of Safari, but it's been more than a decade since it was deprecated and the engine only supported Apple's ecosystem.