Could you imagine if you went on Spotify and clicked on Genre and it listed EVERY SINGLE album in the database in alphabetical order. It would take you forever to browse just A. I mean my personal library is over 4000 albums currently. Browsing by Genre->Albums with that many albums renders this category useless on my device. It's quicker to just scroll through Artists to jump to the album.
I will agree Poweramp is unmatched in how many sorting options it actually has. But... Poweramp along with every personal media player I've tried is completely missing a few of the most BASIC... let me stop there and use a couple of different words: STANDARD or COMMON sorting options there is. Let's be honest and not talk about Android or Streaming or Personal Media Player for a second. Let's look at any Discography all the way back to the 90's, what order do you see and what order do you expect to be able to browse if the list was interactive?
Artists->Albums,Singles+EP's,Guest Appearances->Songs
Albums->Artists->Songs
Genre->Artists->Albums->Songs
Years->Months>Albums->Songs
Playlists
That's the most basic lists since the beginning of any Digital or Interactive lists, and almost all of the streaming platforms have nailed it. Can you honestly say Poweramp or any other non-streaming media player has more than 2 of the 5 fully available?
I know you're saying be thankful for all the great stuff you got, but it's like giving me a huge bowl of my favorite cereal with Bananas, strawberries, blueberries, with some sugar on top, and then saying "sorry no milk or spoon".
I designed websites from 1997-2013 for Gold & Platinum selling Artists, so this is my opinion based on my experience.