Longevity is more a function of how it was taken care of. If it undergoes a lot of moves or has sat without water for long periods of time these things can take a toll on the silicone used to seal it. Glass or acrylic for that matter really dosent wear out. Acrylic can show scratches over time but they can be removed.
A good re-seal if needed and you will be back in business, just dont break the glass and you can essentially keep using it.