Following Microsoft here is a bad advice:
Microsoft had their own failed JPEG fake attempt ("JPEG XR"), and they are behind Apple regarding real JPEG support (JPEG 6 versus partial JPEG 8).
Apple can claim that "macOS is the most advanced desktop operating system in the world", and I cannot deny it. Thanks Microsoft!
Microsoft may of course up the support for the various wannabe image formats, as Apple also does, and DOpus can simply use it via the given interfaces.
My advice is only not to waste too much extra effort (i.e. native support in Opus) for a particular wannabe format.
Regards
Guido
JPEG developer