Jim Macklin wrote:
But when it all goes TU, a heading and time to find by DR,
the place within fuel endurance that is VFR, and being
prepared to just hold an altitude and heading, and have an
idea of where you are when you break out an hour or two
later at 8,000 feet 300 miles from you last knew your
position and then find an airport.

That's just basic IFR training. The same thing can happen in a steam
gauge airplane. The only difference is that G1000 has more backups. If
you lose your single alternator in a Bonanza and you're IMC for an hour
or so, short of a handheld, you're in the same situation.
However, the original discussion was about second guessing the accuracy
of the information. That is critical in steam gauges since they often
fail in strange ways (like my night IMC "tilted but functional AI").
However, its MUCH less likely in the G1000. In the G1000 you'll either
get red X's or, worse case, blank screen, but not slightly off data.

-Robert