Sony Elcaset? Far more obsolete than RtR!
"The system was technically excellent, but a total failure in the marketplace.."
"No pre-recorded Elcaset tapes were produced and the machines were withdrawn from the market after only a few years.
When Sony pulled the Elcaset from the market in 1980, the remaining equipment was sold off in Finland for bargain prices."
https://obsoletemedia.org/elcaset/
"The system was technically excellent, but a total failure in the marketplace.."
"No pre-recorded Elcaset tapes were produced and the machines were withdrawn from the market after only a few years.
When Sony pulled the Elcaset from the market in 1980, the remaining equipment was sold off in Finland for bargain prices."
https://obsoletemedia.org/elcaset/