[theultdev]

You'd at best break even over the decade, that's not really a sound financial strategy.

And many of these things, like heat pumps last twice that at best, so you have to account for depreciation.

It's more economically sound to invest the money or pay off your auto loan / credit card bills.

It makes no sense to switch when you have a working system, only to replace a failing one or during construction.

See my comment here: https://news.ycombinator.com/item?id=44425004 for a breakdown of one scenario.

Again, I do think this tech is great, but I see no upside in switching when you have a working system.