Glass Panel Longevity

Recently, Sylvain posted:

Guy Elden Jr wrote:

Do people repair mechanical gauges or simply replace them when they
stop working?

It's a lot easier / cheaper to replace one mechanical gauge than an
entire instrument panel.

I don't know much about the G1000, but I am currently reading Max
Trescott's book on the subject; isn't the whole idea of this system
that it is made up of easily serviceable and replaceable (and
presumably upgradable) modules?

I don't know, but I would design the system that way. Even at the level of
integrated circuits, there are plug-in replacements for obsolete parts,
and I don't see any advantage to using unique components in this kind of
application.

Neil