I believe in maintaing things, but like things to work well too.

HATE failures at inconvenient times My job requires when things I
jump.

So I replace my HW tank every 9 to 10 years before it fails.

Pick nice warm day, of my choosing starting first thing in AM, with
all day to handle whatever troubles come up.

Otherwise I find the basement flooded at midnite, no hot shower in AM,
on a already busy day.

When something cost 40 bucks per year why mess around?

If I get that tank to last another few years it might save 5 bucks a
year, thats meaningless in comparison to a BIG hassle!