Oh no... I can feel a
just sayin' coming on...
Ok, so that's an interesting point Tom, though I would suggest that maybe its nice to just enjoy playing your music rather than worry about how long you can play for. Even if it's just an hour or so of really great music, what matters is that it's played from the heart. People appreciate a few tunes played with feeling and honesty, so who cares if you repeat them later on. Good repertoire should grow slowly, like the red spruce of the Val Di Fiemme, and you know what they get made into...
Regarding looks and tone... perhaps when specifically talking about the Castagnari, its wooden look and style is not what makes it special. I'd say there are many better looking accordions out there. I don't think "looks" matters here.
What is more important is the unusual tone. The Castagnari and Saltarelle seem to capture something of the old
folk terroir; a tonal character that is usually reserved to quality melodeons, concertinas and ultimately the gold standard of the fiddle (imho). I think the Castagnari and Saltarelle are quite unusual in that they are of the same ilk.
To put it another way, I'd suggest the reason many people play cassotto accordions is because it vastly improve the sound of an average accordion. I'd probably go further still and say, without cassotto, some accordions can be quite rough sounding. Yet the likes of the Castagnari and Saltarelle, from the examples I have heard or played, simply don't need cassotto. They have a certain tone that makes you want to listen to them - they sing. I think that's quite rare.
So £6K or thereabouts for a non-cassotto accordion is not cheap. That's especially so because we tend to have the mindset that expensive accordions are "feature dense" with many voices, keys, buttons, cassotto, midi, internal mics etc. It's like having a car with extra spec. However, by contrast, a person can easily spend 6K on a high quality violin, and yet they are very simple. Maybe this is an accordion that bucks the usual
spec-forward trend... "J.S."