[zerodensity]

JSON is better than xml which it replaced. It's now such a defacto standard that if you make an API without json it will just be a hassle for your api users. Doesn't really matter if your encoding format is better or not.

You can still have schemas in the code through. We use alot of pydantic at work for this. You have your data schema class that is statically typed which you interact with and decide/encode it to json in the background.

All services expose an api to get JSON schemas from the apis so you can automatically generate the remote types used by other services when they change.

Using schemas for remote services has made life simpler for us so I would say schemas are a huge win. Not supporting JSON is not something I see happening anytime soon though, multiple parallel encodings based on schemas might be a possibility though.