Those "dumb" watches will still work in 5 years. Hell, they will still be nice in 100 years. Smart watches won't hold up for 5 years.
They're generally intended to last a lifetime, however long that is, and possibly be left to heirs.
It might have minor scratches but that's it.
A smart watch will probably not even power on 5 years from purchase (due to bad battery); or be able to pair with your phone (new phone OS might not be backwards compatible).
And chances are that's just the glass face, which takes minutes (and a few bucks) to replace.
The body may have some minor scratches, but I think it only adds to the charm.
This will be interesting to watch (sorry!) over the coming years.