Its a legit idea, but the hassle and possible damage or causing a leak
isnt worth it to me.

So every 8 to 12 years I install a new tank, thats not much money in
comparision with everything else it costs to live.

From say age 20 young adult to age 70 say 5 tanks at 500 bucks each.

$2500 bucks for a lifetime...

Now compare that to likely twice as many new cars in the same time
period.

20 grand times 10 is $200,000 plus insurance repairs etc etc........

Hot water tanks are cheap..........