I just had my water heater replaced. The plumber told me if I had to have one of the new ones my WH closet would have to be enlarged, which is not possible due to it’s location in the house. I wonder how many $700 WH jobs are now $2500 jobs because the only option space wise is a Tankless heater.
Wifey and I have visited two different couples that had those...making four people taking their morning showers within a relatively short period of time; both times we experienced a lack of "hot" - regardless of the claims.