Let the upsampling - remonetization begin!!!
Very rare to source undithered 192/24 files.
Ear training schools will be needed.
12 mb mp3 to a 280 mb 192/24 bit files sound the same to most untrained ears. Heck some pay top dollar for vinyl cut from poorly dithered 44.1/16 bit files. One never knows the true source file unless it comes off the console - and most studios multitrack at 48k with poor summing. Sorry to crash the party - just speaking from the other side of the glass.
Wellllllll.....I am a early Roon adopter with a lifetime purchase..I have HiRez Tidal, I use iTunes for ALAC and I installed Amazon Music last night.  I’ve been using it for a few hours now....My initial impressions are very good.   Selection-excellent, sound quality-excellent (I signed up for UHD), navigation-interface much better than Roon and Tidal.  I don’t like Amazon (the business model) but I gotta say I like this.  Now, I also like Tidal for MQA so I’m not going to doing anything drastic yet...But I’m beginning to have dark thoughts that I could live with one service and Amazon may be it for me....say it ain’t so...RIGHT?
Most will not be hi res.  If they were originally recorded before digital recording, they cannot be high res as the source was not.  Putting them in a high res package, does not improve the resolution.