Or the hallmark of having experience working in a particular domain, and simply favoring techniques and approaches that are familiar. Is there any particular reason why anybody should believe that any of these "unique, invisible aspects of Replit's architecture" constitute any kind of genuine "intellectual property" in either a legal OR moral sense??
I mean, if you're arguing that he literally copied copyrighted code, then sure, OK, maybe you have something. But nebulous appeals to "design decisions?" Don't expect many people to have sympathy for that. At some point you're treading into "anybody who ever worked for a company making cars can never work for another car company" or "A guy who makes a new chair owes money to everyone who ever built a chair" territory.
