Yeah, it's probably the "fastest-growing sector" in real estate.
Meaning, interest has gone from trace to a larger trace.
First and foremost, the overwhelming majority of home purchasers care about how the house feels to live in - the physical spaces, finishes, siting, light, floor plan.
That isn't to say that homeowners aren't increasingly interested in retrofitting. But as a Top 5 "Must Have" for homebuyers? Not so much.