Why is it not possible to play directly from my Android phone anymore

I’m afraid it isn’t Sonos who dictates the concentration on streaming services, it is the public. 

• Music streaming makes up 84% of music industry revenue
• The music streaming industry grew by over 10% over the last year
• Music streaming’s global revenue currently sits at $17.5 billion
• Paid music streaming makes up 23% of all music streaming
• 78% of people listen to music via a streaming service
• Over 600 million subscribe to a music streaming platform

https://explodingtopics.com/blog/music-streaming-stats

And at last count (and it was a while ago), 93% of content on Sonos is done via streaming.  7% is local libraries.

Dude, I'm not disputing the popularity of streaming services and I don't think anyone needs it spelled out. I'm just suggesting that not having to support music libraries will be a bonus for Sonos.

Support for playing from an Android phone and support for local network music libraries are completely different. The loss of one due to a change in the mobile’s operating system has absolutely zero bearing on the other.

Who said they aren’t supporting local music libraries? 

The writing is on the wall for local music libraries. New search doesn't include local libraries and it ain't gonna be called New search forever. Expect the usual suspects to be doing the rounds putting a positive spin on it when Sonos pull the plug on it! 😀

So that would mean "nobody" said they aren't supporting local libraries.  Gotcha.

I’d be surprised if the music library went away, there are enough customers that have content not available via streaming that would be quite unhappy.

Remain a very low priority, probably.

I do not think anybody has put a positive spin on the end tp playing music that's on your phone, be it from Android recently or from an iPhone years ago. For many users this has not been a good experience.  It's just that some believe that they are not being lied to when Sonos says it is unavoidable. Others keep going back to the past. 

There are so many ways to play a users own music library on Sonos. It will take some getting rid of. The methods that spring to mind (off the top of my head) …and some (not all) which I may use are…

• Sonos SMB Shared Library
• Sonos HTTP Shared Library
• Playback over Bluetooth
• Playback over Airplay
• Playback over Chromecast (to TV/Soundbar)
• TV Apps that access a NAS Share, VLC etc.
• Apple Music iCloud Service within Sonos App (library copy)
• Plex Service
• Emby Service (direct control)
• iBroadcast Service (library copy)
• YouTube Music (library copy)
• DLNA (Windows Media)
• Playback over Line-In (mobile streaming device)

I’m sure I may have forgot some from that list too…

However, it will really take some doing to stop folk playing their local library files on Sonos Speakers.

Daddy chill. Why are you trolling me and claiming that I've said that someone has said that Sonos are not going to support local libraries? Please link to the relevant comment. All I've suggested is that not having to support local libraries would be a bonus for Sonos and the lack of local library results in New search hints that they could be headed in that direction.