Best practice is to replace toilet during rehab. But why?

[Paul Winka]

I have heard that the best practice when renovating a bathroom is to include replacing the toilet even if it doesn’t appear to need it. The one I got looks and works great, but it’s probably 30+ years old.

What’s the reason for this? Do older toilets eventually start to leak causing high water bills? Or is about using less gallons per flush, therefore saving money?

And, as a bonus, what's your go-to toilet at Home Depot for rentals?