Dewpoints in the summer in my house are under 60F< even in the basement, so cold pipe condensation isn't an issue.
I got the water heater remote control mounted on the main floor next to the thermostat. Not that I really need to mess with it much, but it satisfies the engineering nerd in me to be able to see if it's running or adjust the temp if desired. We have it set at 112F for now. Seems to be a nice temp for washing hands and you mix in just a very small amount of cold for showers and kids baths.
I raised the temp to 140F and then turned on every hot water tap in the house to try and max it out. NO fault codes, no fuss. Just endless hot water. I don't have enough water pressure however in the house to sustain that many faucets and showers simultaneously it seems. But I can definitely run 2 showers and 1 faucet, DW or washing machine at the same time, no problem.
The plumber is comming back tommorrow to do the recirculation piping.
ON a side note, I drained the 18 y.o tank water heater. Pretty good amount of rusty crud came out at the end and when I flushed it through a few times. I suspect the glass lining is probably compromised since the anode rod dissolved a few years ago. It's a 9 yr tank on it's 13th year. Still look almost new FWIM. It will make a nice emergency back-up.
Previous home - 1968 single story Ranch/Colonial, 1200sqft - 11 windows
Current home - 1925 2 story Beaux Arts Neo-classical overlooking the Mississippi River, 3200sqft - 48 Windows