You have some good points, although most actives mount the electronics
on an aft slab of milled heat sink, and if they are designed properly
(look, carefully, at 70s and 80s Motorola solid state RF sections) they
will take a pounding. Genelecs have been running two and three shifts
for fifteen years now with good reliability.

As for service, the elegant thing would be the user calls the company
and they ship out a tested refurb and you swap them out, returning the
failed unit. I understand Genelec will do just this for credible in
warranty failures.

However, one alternative would be a multiple channel amp with
dissimilar sections and a proprietary cable, containing the crossover
and multiple power amp sections. While this would result in potentially
cooler operation, it negates the ease of use of active speakers.

I think active speakers will appeal most strongly to the "I don't know
audio but I know good sound when i hear it" crowd, when properly
marketed. Frank Zappa used to put on the dust jacket that they used a
certain JBL monitor (not active) and that was the most accurate for
that record and indeed pro outlets sold them to home user Zappa fans
for several years.