[hindsightbias]

There won't be anyone left after 10 years of culling:

> It finds that each year homeowners remodel upwards of 10.2 million kitchens — roughly one in 10 of all households — and 14.2 million bathrooms, two of the most important rooms in a home. Further, annual new home construction adds roughly 1 million kitchens and 2.3 million bathrooms to the marketplace

National Kitchen + Bath Association (NKBA)

[bluGill]

Some people remodel more than others. I've seen kitchens that haven't changed since 1950 (including some things that we always unsafe). I've seem people who remodel their kitchen every 3 years. 10 is average, but there are outliers in every average. There will be a lot left in 15 years, but very few in 50 years.