Everyone's different, but I would happily take 6h of working at my own pace with full access to all of my normal tooling in a low pressure environment over 1-2h of high pressure speed coding using "tools" (web editors...ugh) I'm unfamiliar with. It sucks that you were ghosted, and I would view that more as an indictment on that company rather than the practice of a home assignment. To me there's no easier evaluation of skills you could ask for.