Sure, if your structure doesn't contain any pointers and you only ever want to support one endianness and you trust your compiler to fix the machine layout of the struct forever.
Sure, if your structure doesn't contain any pointers and you only ever want to support one endianness and you trust your compiler to fix the machine layout of the struct forever.
Mainly the first thing. If your struct is already serial, of course serialization will be easy.
...which is true for 99.999% of the time anyway, so it's not worth worrying about.