RV tankless water heater

Slight hijack of the thread about to happen here, but I need to offer my 2 cents regardless. I run a HVAC, plumbing, and electrical contracting business. We've sold and installed hundreds of tankless water heaters in homes with very few problems. I put one in my own home in 2007 and it has performed flawlessly since day one. Most reported problems are due to one of 5 things: (1) improper system design, (2) improper installation, (3) professional failure to properly educate the end user, (4) poor product offering decision, (5) lack of maintenance. Tankless water heaters are not water savers...they are meant to be turned on and run for a period of time. Most residential models pass up to 0.6 gallons of cold water through the unit before telling the burner to ignite which causes a delay in getting hot water to the tap. For those who use short bursts of hot water (ie: quick rinse of dishes or a military shower), the line is just getting packed with these pockets of cold water which is known as cold water sandwiching. Having said all of that, it's a no-brainer to see why a tankless is a bad idea for RV'ers. We've all been programmed and trained to conserve water by using short bursts whenever possible. A properly designed and installed Rinnai or Rheem tankless in a home is worthy of staking my reputation on. Other brands....not so much. In fact, I won't even install them. But for an RV, no. I don't see tankless as a viable option just yet.