hope you have soft water. . .
I don’t but I live by my little lonesome, wash small laundry loads, and like short, warm showers.
That’s probably how I got the old one to last over 20 years. It was a Rheem 40 gal NG heater and came with the house. No problems til this week. Probably full of sediment by now.
And they tell people to swap them out every ten years. They lie.