Wood can be maintained to last forever, and nobody knows why Strads sound so good, with many theories out there...why does a 1939 Martin often sound so much better than new one? It will if it's played, and nobody knows what a Strad sounded like when new...likely pretty good, and later simply great.
Saving the sound of the Stradivarius
An interesting project is taking place in Cremona Italy. A link to a brief piece in the New York Times describes the effort to chronicle the sound of various Stradivarius instruments before they have lost their mojo.
https://www.nytimes.com/2019/01/17/arts/music/stradivarius-sound-bank-recording-cremona.html?action=...
https://www.nytimes.com/2019/01/17/arts/music/stradivarius-sound-bank-recording-cremona.html?action=...