Water heaters

My son built a home in one of our barns, with propane tankless, propane fireplace, about 12 yrs ago, no drama, well water, no softener, and I had totally forgotten about the filter. No turbo, silent . Slow to get hot water .
We added an addition to the main house for my daughter and grandkids, we moved into the addition
The addition also has a propane tankless with a fkn turbo or some such, and where we mounted it, the turbo will wake you at night if used. During the day, it is noisy but acceptable for near instant hot water. 5 + yrs, no drama .
The main house is 60 gal electric, they last about 6 - 8 yrs.before springing a leak, no element probs .