I agree one shouldn't be worried about the cost of a house after purchasing it, and I understand about heirs, but I still like to know what my R/E is worth.
My situation will have me as a snowbird for awhile, but not forever, and I am expecting to sell one of the homes in the future (the one up north I expect) and use the proceeds to help fund the remainder of our retirement. I'm talking 10 years before I sell, and I built a spreadsheet that has the home's values compounding at 5%. If it all works out much differently I'll have to die sooner!
My point being that even after I've bought, I still want to know. Just like I'd want to know how much I have in the bank. Or if there's enough beer in the fridge! I wouldn't worry about it, but I may have to adjust my plans to fit the reality of the situation.