Lifetime of a VB?

Hello,
I’m new here on this community.

Many times i thought about getting a VB because I’m collecting GameSystems from the early Atari Pong to the XBOX360.
Some weeks ago I bought a VB with three Games on Ebay in nearly new condition with original packaging.

Until now I own 9 Games and I love to play the VB, but there is one question:

Whats the Lifetime of the moving mirrors in the VB?
Is there somewhere a detailed picture of the mirrors and how they work?

I love my Gamesystems and I want to play with them in ten or more years but I think the VB and all Systems with CD/DVD wont last this time because there are no spare-lasers for this systems and the vb mirrors will break mechanicaly.

Cobra71

Sorry for my bad english, but my german is much better 😉