How long do good speakers last?

Bought a pair of ADS L810 II's in 1978. Used them until about 5 years
ago. Passed them on to my brother and as far as I know, still making sounds. Only issue I ever had was blown tweeter fuses when my worthless step son used them while I was at work,

I have a great pair of Advents from 1972 that had virtually no foam left. Got a couple of OEM woofers (an expensive fix I admit) and now I enjoy the sound I remember from way back when.The cabinets show their age but are still solid. Watch for foam loss and tweeter breakdown and 50-year-old speakers are possible.

just got me thinking

there is plastic in the oceans and landfills that are supposed to last 1 million years

why can't they make speaker driver surrounds with that cr%p?

just like black boxes on airplanes...  🙃

I still have my Pioneer CS 99a speakers from 1978 that are still in great condition. Surrounds are cloth so never need replaced. They're in the barn along with my Cerwin Vegas VS 150's I bought new in 1997. I did have to recone the foam on the Vega woofers last year, but both pair still play flawlessly. Keep in mind these speakers are in a dirty, nasty, farm barn with critters, dust and filth. Haven't even been dusted off in 5 years. I would think technology would have them last even longer.

I have a pair of Klipsch La Scala, which were made in 1981 and  a pair  of K horn Speakerlab, which were made in 1971 for more than ten years and a pair of JBL K2 9000, made in 1990, which I bought 3 years ago. All of them are working with no issue. I thing they sound perfectly, but I all way wonder if how much their sound quality reduce compare to the new ones?