alt Hacker NewsNone of these require a domain to work. There’s plenty precedent of things taking off without having a domain, eg Wordle, all Neal.fun sites, Hacker News, and I’m probably forgetting a few obvious ones.
I know that “mystupidvibecodedidea.com” is all the rage but nobody cares if that’s instead on yourname.com/mystupidvibecoded idea except you.
Back in the day (~2003) it was popular to get a domain name for every project. Loads of people I knew where holding a domain name for every idea they had. I even had a few (~40). But in like 2008 I think I switched over to using just sub-domains of my primary. If anything took off I could then find and buy the cool name. And if it dies (likely outcome) I've saved $30.