I have 8k albums in my personal collection, but I've been building it for years, most everything is pirated or shared between friends or purchased on bandcamp. I stream it while via plexamp when I'm working or not at home, it's very nice.

I can also connect to my friends Plex servers. My one friend has 35k albums.

in case someone doesn't believe me haha

Edit: damn he's up to 39k