Thomas Borchert wrote:

Making the equipment more
complex,


Yes, but is it? A GPS moving map approach is more complex than an NDB
approach? Or a DME arc? or anything else very complex? You sure? I'm
not.


You fly GPS approaches using the moving map? I use the CDI and the along
track distance cross-checking with the approach chart.

Once the approach is loaded from the database, and the pilot is headed
for the correct fix as per the procedure for the circumstances, flying an
LNAV approach is easier than flying an NDB approach, and far more
accurate. But, it is more difficult than flying an ILS approach and not
as safe. Flying a Baro VNAV approach (once all the database issues are
resolved) is very similar to flying an ILS and is about as safe.

But, so far as I know, no light aircraft has IFR-certified Baro VNAV.