How long do good speakers last?


I just ordered a set of Sonus Faber Olympica Nova Vs, my first foray into nice speakers. I turn 51 this month and am hoping these will be the last speakers I ever buy. But it got me to thinking - how long should I expect these speakers to last? Or any good speakers for that matter? Does the foam eventually break down? Issues with general wear and tear? Appreciate your perspectives!
128x128bigtex22
In 1972 my wife and I bought a pair of Bose 901, Series 1.  That was before Bose started using foam surrounds. They still play in our son's basement party room almost fifty years later.
I have JBL Control 10 that I have been running for 28 years now and there is nothing different about them since day I got them home
It seems that the older Magnepans lasted maybe 20 years or so now or until the wires seperated from the mylar. I have the impression that the newer Magnepans (1.6, 1.7) last indefinitely.  I want to learn about the experiences of other Magnepan owners
Recently inherited our father's Altec "Carmel" speakers from the early 60's and we have a pair of Altec VOT A7-8 from the mid 70's. Both sets of drivers are original and sound like new, while the cabinet finishes are being refreshed and the grill cloth replaced. As mentioned before, take good care of them and they will last a long time!
avitacom

I have 20 year old 1.6's that I push pretty hard in a large room. Not in direct sunlight, but a room where I smoke. No sign of de-lamination. The crossovers have been removed to run active so I can't speak to crossover life.

Jim S.