Check out the ‘Now’ and ‘Top of the Pops’ collections.
There are also back catalogue collections of ‘must haves’ through the decades from the likes of mastermixdj.com
I am 100% digital.
My main music is stored on my MacBook but backed up on Google Music Manager (c. 20,000 track capacity).
Anything i don’t have i will play via Spotify and/or take a note and buy it post-gig.