> Who would use Ogg/Vorbis and not expect compatibility issues with third party services and products?
It doesn't matter who, if the only thing you got is Ogg/Vorbis file and you have no lossless original. Normal browsers support it anyway, as well as Opus.
Ogg/Vorbis was a solution to patents sick MP3. It was adopted rather well, except for those who can't stand not patent encumbered codecs (Apple for instance). Opus is in better position though, since it's part of WebRTC standard and Apple will have to support it even if they hate the idea.
And audiophile idealists should be using flac anyhow, in which case the conversion to mp3 wouldn't be causing any major issues (obviously mp3 encoding itself causes some lossiness, but it isn't nearly as bad as lossy->lossy)
Who would use Ogg/Vorbis and not expect compatibility issues with third party services and products?
It's not like Ogg/Vorbis was ever anything more than a solution in search of a problem that only few idealists adopted.