ONNX is pretty old at least 5 years and its still mostly useful on Nvidia GPU's or x64 CPU. TBH. cool that projects like that are still alive but MLIR looks like the future of proper model storage, and custom format and loading is still a king today cause you can easily modify model and optimise or even fine tune which isn't even possible in ONNX without ton of work (also static spec and versions in protobuf sucks wish they migrate to flatbuffers).