No. I have some background in this.
Tankless electric heaters can represent electrical demands equal to the rest of the entire house, including the air conditioning, all being on at the same time. A whole-house tankless electric pulls HEAVY current to heat water so quickly.
Tankless gas heaters are more easily fed - it's a much more modest amount of natural gas - but require venting.
Both types require, at a minimum, non-optional annual maintenance. Americans aren't in the habit of performing ANY maintenance whatsoever on their water heaters, if you're of the same mind then this alone might be a deal breaker.
A tankless heater is not an instant heater - if you're looking at a tankless unit to avoid the delay of cold water clearing out of the pipe before hot water arrives, tankless heaters don't solve that. That's a different problem.
I've looked at it. I have three-phase, 200A electricity service at my home - it's damned uncommon but it seems my house was a training exercise for a journeyman electrician - so I have sufficient electricity to do it. I have fairly easy access to the pipes and could use the space that getting rid of the tank would free up. But I'm still not going to do it. It's not worth the hassle.