In reply to:

1) prolongs the life of your gear (citing the example that a light bulb filament will burn out faster with repeated on-off's, due to heating/cooling and expansion/ contraction of the wire)



By what amount of time is the life of these electronics lessened by such a practice?
I highly doubt it is in the years category and a light bulb filament is far more fragile and PHYSICALLy prone to breakage than most wires in your electronics making this a feeble analogy (but sounds convincing to the brain).
In reply to:

and 2) you don't have to wait for the electronic components of your gear to "warm-up", when power is kept on.



And the audiophiles say warm up does what?
Change the audio quality to the extent that you should consider buying blankets and a bed warmer for them?

In reply to:

Any thoughts or opinions as to whether there is any merit or harm to leaving audio gear... always powered up?



No merit except for the constant burn of electricity across the nations home electronics sucking up an already taxed power grid. Save the natural resources and turn off your electronics. I highly doubt you will notice any difference.


"Those who preach the myths of audio are ignorant of truth."