High-quality gear was definitely available in the '80s, if you were willing to pay for it — and might have been cheaper in the long run.
How is this better than a set of headphones which last 18+ months? Just the NiCd battery packs were something like 20 times bulkier than the AirPods and lasted less than a third the time with careful use. Normal replacement cycle on those battery packs would be more expensive over 2 years than my AirPods, particularly if you consider inflation.
(Only 6 months out of a set of NiCds??? I got multiple years out of more than one set. NiCds are very easy to take care of; just remember that they need exercise. Always drain them fully before charging, and make sure not to overcharge.)
Step 1: superglue
Step 2: tape
Step 3: buy new ones