Water heaters, tankless vs conventional

[Whiskeydan]

I have both and have come to the conclusion that if I use very little hot water the tankless will save on the electric bill.
However, I believe resistive losses in the wiring contribute to the tankless being less efficient. Yes, LESS efficient.
Tankless WH require a huge amount of current (11KW) to heat the water on the "fly". Conventional tanks types require much less power but, may run extended periods depending on the insulation, ambient temps. So it may be a wash depending on hot water usage habits.

I have a tankless at the cabin which is 10-12 yrs old and is now showing its age. One of the elements has corroded in place. Tough to find parts is another negitive.
At the house I have a conventional 40 gal WH.
I plan on building a new home and would like to hear from others with experience on tankless vs conventional.

Dan