Hot Water Tank Maintenance advice

[omega50]

I sit on the board of a Housing COOP of 18 housing units. 40Gal Bradford White Defender series Hot water tanks were installed in Dec 2008.

One of the other board members has a brother who is a plumber who wants to change out the anode rods on all the 18 tanks.
I know for certain that the anode rods have never been changed since install.

I am opposed to the decision and expenditure on the basis that if a anode rod provides 3-4 years of cathodic protection then these tanks have been at risk of increased corrosion for the last 7-8 years.

I would prefer to start fresh with a more rigorous maintenance schedule once new tanks are installed in the future. Could be tomorrow or in a few years. I have no crystal ball. This and regular scheduled flushing make sense to me.

Is there anything to be gained in this case in terms of tank longevity by changing anode rods for the first time at 11 years in?