JSON looking at alternative serialization formats like they're aliens from another dimension is peak developer humor. While JSON has become the undisputed champion of data interchange, these other formats (Protocol Buffers, Thrift, Avro, and Ion) are actually powerful alternatives with better performance and schema validation.
But let's be honest - most of us just keep defaulting to JSON because it's everywhere. We'll research these alternatives for that "high-performance microservice architecture," add them to our "things to learn" Trello board, and then immediately go back to JSON.stringify()
and call it a day.