Favorite obsolete formats.....

I love 45s first when that's all I could afford as a kid. Then 33s was worth saving for in my teens. Then cassettes were great in my working twenties. Nothing like listening to little feat live on my equalizer setup in my Ford Maverick while out for lunch with a quart of beer with my working buddies. Then back to collecting LPs in Boulder where my buddy Joe owned a record store and the rest is history...
It was all great.

@baylinor     I'm Willin' to join you on listening to Little Feat blasting to distortion in a beat up Ford any day. 

What? No one has promoted the wax cylinder and player with a glorious morning glory trumpet speaker? Now THAT’S real analog recording and acoustic! (THIS is an Edison Recording!)

CDs.

I had a quad 8 track in my 68 chevelle, best of times and rock.