How often do you file/purge physical copies of music?

^ This has been my method the last few years. I basically just buy 20-30 CDs a year now.

Do you limit yourself or do you only find that many that you want to own?

(a few months later -- apologies) I use streaming services to narrow down my purchases. I kind of have a loose rule of roughly 70%-or-better ratio to buying the album as a CD or just a handful of songs.