As an engineer in the power industry, I find the concept of electric resistance hot water abhorent...power stations at 35-40% sent out, versus even the worst efficiency Gas...
My parents have electric tanked glass coated steel, and it worked OK for a family of 5, about 15 years life (they never changed. I've had electric gravity with a cystern valve, and it sucked.
Here, in my place, it came with a Rheem flued gas tank. Loved it, as I could run the biggest bath, then by the time it needed a reheat, was ready to go again...I set the thermostat up around 70+ degrees C. Admittedly it was 2.5 star.
It died a few months ago (flue leak put the flame out and drowned the floor), prompting a replacement.
We replaced it with a 5+ star "instant" gas, bolted to the outsiade wall, freeing up enough room for a decent gun safe.
Instant is relative, as it takes a few litres of flow to get fired up. It's also limited to the new max of 55c (better half uses no cold these days).
First gas bill since getting it, and WOW what a difference.