Water heaters

I have been in my current house since 1998. I had to replace what may have been the original water heater (house was built in 67, just like me) and just like the last house I went from a 30 gallon nat gas to a 40 gallon nat gas. I was in my last house for 5-1/2 years and had to replace it twice while there. I'm on my 4th one here since 1998, I never buy the cheap "6 year" tanks, usually buy a 12 year. One of previous 3 tanks (they never go out at convenient time) I had to settle for a 9 yr because I needed one "now" and they were out of 12 yr models. The last time I went to a tankless, since I wanted to get it away from the front of my furnace, as I have had to work on the furnace a few times in between water tank replacement and every time I had to get to the furnace I had to drain and pull the water heater so I had room to get to the furnace.
Mainly when I've had to pull the a coil (twice) as having black labs, and their hair goes everywhere/, and I've had dog hair plug the fins in the a coil (I have a downdraft furnace) to where the heated air won't pass thru the a-coil into the plenum/ so hot air would back up and trip the limit switch, and go on 3 hour lockout. Not good when temps are near zero.and I have to pull the water heater out to access the a-coil
I don't currently have any dogs, but anyway now that I have the tankless mounted higher up I can access anything I need to on the furnace without dismantling anything on the hot water.

And no, you couldn't give me an electric water heater, stove or furnace.