Favorite obsolete formats.....

Cassettes were an amazing convenience for listening in the car or the Walkman.   It’s slow tape speed and small size was never intended for audio fidelity.  It did lead to a cool performer name Dolby and left us with ever evolving dolby apps added to audio visual receivers that are hardly used 

Laserdisc.

The Golden Record aboard Voyager. Probabilistically, a complete waste of time and effort. 

DVD-Audio

I still listen a lot to FM radio at home, as there are two local stations that have a good mix of their chosen genres (old time rock, old time country).  In the car, it’s hard rock mostly.

As for other formats, I don’t use them but keep the old equipment for sentimental reasons.  I have two Sony VCRs that still work and a Technics cassette deck that works fine.

A few months ago, I considered, then declined, purchase of a 40+ year old Teac reel-to-reel.  The price was fine, but it would need to be gone over by a technician, which again could be an acceptable expense if I had tapes to play on it. I have fond memories of a Sony R2R I had during the 1970’s, but today there really isn’t need to record music on one when I can burn CD’s.  Purchasing pre-recorded tapes for the big money they go for — no thank you.  But R2R looks cool as well as being the best way to enjoy taped music.