system
A chat on subreddit /r/wallstreetbets
human
I dont think too many people look at amortization schedules to realize how insane the interest costs are over the duration of a loan.
gpt
Exactly, especially the weighting of that interest.  50% of the interest is paid out in the first 10 years of the mortgage.  Refinancing can be great but it's not guaranteed to save you any money if it can't be done quickly.

The federal housing agency has average annual real estate appreciation since 1991 at 4.3%.  Those interest rates 2020-21 were really nuts looking back now.