I imagine, and truly hope, that Apple are concentrating their resources on efforts other than providing lossless music either on the iTunes Store, or through Apple Music.
By so many definitions, interest in lossless can only be niche. Most people do not care about the quality of their music, so long as it sounds good to them, and I doubt even Apple could convince people to take an interest. And further, any perceived gain in quality might only be heard through particularly expensive audio equipment, which most are unwilling to purchase.
Add to this the case that, largely, lossless audio is most useful when stored for archival purposes. At the same time, we are seeing that people are not wedded to psychical ownership of CDs, nor are concerned with possessing local copies of their music, so long as it all just works. To most people, that means being able to listen to music conveniently – on many devices, on demand, etc.
The idea that the average music-loving person should take interest in lossless audio is silly, born of marketing, and a lesson in how gullible humans are. It is already bad enough that Apple are having to push Beats audio equipment in its current lineup. I do not want at all to see Apple pushing lossless audio to the masses, at an increased price. It would be a terrible capitalisation upon audiophilic myth and superiority complexes over any evidence.