NWriting all API-code in your code in the same file is not a great idea. It's easy to merge routers with other routers.
NIt returns a new router so you can always pass that router back to mergeRouters for more if there’s really a limitation
NIf you’re trying to merge this much stuff though I’d be questioning your use case. Most people would use the first method documented on that page to structure their API, not having a single router with 100s of procedures on