Quote Originally Posted by Gman View Post
I think the long-term viability of tankless has a lot do do with the mineral content of your water.
Holds true for all water systems. Where tankless systems blow tanks out of the water, so to speak, is that there is seldom standing water and to a much lesser volume. Tankless systems need flushing once a year. It's a bigger pain than changing your anode rod but no one ever does that either.

If you have a whole house filter system, it's possible for either system to outlive the owner.