We only do that on embedded platforms, meaning MCUs. Anything that runs Linux is better off with CBOR or MessagePack or even ProtoBuf. Dunno about FreeRTOS et a

We only do that on embedded platforms, meaning MCUs. Anything that runs Linux is better off with CBOR or MessagePack or even ProtoBuf. Dunno about FreeRTOS et all. I've only seen libraries for JSON. ESP32 and Cortex M4 are powerful enough for serialization formats but at the expense of wasting cycles, so you're probably better off with a custom binary protocol most of the time. But if you want to sell your product to integrators use a well supported serialization format. Nobody is going to write decoders for your custom binary format today.