I wonder if the "replace every year"er's replace the anode rod in their S&B house water heater? (By the way, I don't, coming up on 15 years now, I'm just too lazy, and, after this long, probably wouldn't be able to get it out anyway. We're on softened well water, and I have never found any sediment or anode rod "remains" in the tank.)
As far as the anode rod in th TT's water heater, 3 years old, always only use soft water in the FW tank, and less than 25% consumed. At this rate, should last another 5 to 7 years. I'm not going to worry about replacing it until it's over 50% consumed.
Just my opinion!
Rick & Debbie; Brandy & Schnoodle Dexter & Fritz R.I.P. the Doxie "Kids"
2015 Jayco Pinnacle 36RSQS 5'er
2013 Chevy Silverado 3500HD LTZ, 6.6L Diesel Dually; B&W Goose Neck and Companion 5'er hitch