I don't know if you're expert, but I'm curious: What's the push/pull balance between destruction/abandonment of old homes vs. construction of new homes vs. cons

I don't know if you're expert, but I'm curious: What's the push/pull balance between destruction/abandonment of old homes vs. construction of new homes vs. constant habitation of the existing homes? I guess I'm asking is the effective amount of houses on the market stable, decreasing, or increasing? Also, relative to number of people looking for homes, what's the situation?