If you would want something closer to commercial but yet still useful for the home, some few manufacturers have better solutions.
Tank DWs don't make much sense in home settings.
They use very little water per wash cycle, but actually hold very large amounts compared to household machines.
They have their wash water tank, which usually holds a few gallons, at about 140F. Then they have their post wash rinse tank, which holds a gallon or two at 160+F.
Each cycle, after the wash, a portion of water is drained and the post rinse water re-ups the level.
That means at any time you have the equivalent of lets say 8gal of 140F water in the machine.
Keeping that amount of water at that temp all the time makes sense if you run 5+ cycles an hour for hours on end.
If you only run 2 or 3 cycles, filling the machine and getting all the water up to temp is a huge waste of energy.
In europe, SMEG offers a model like this, but in the US, only Miele offers "Pro for the home" machines.
General idea is that through several alterations, you can get loads done way faster.
There are 2 platforms.
One is based on the G7000 platform, basically the equivalent of the little giant DWs.
Those have home style baskets. They use 2 wash pumps to run both racks at full spray pressure all the time.
With additional heating power, they can run a load in as little as 24min. The 120V version takes closer to an hour.
The second platform is the true commercial platform.
Those come with racks, but you can swap those out with any of those standard racks known from tank type DWs.
Cycles go as low as 6min.
They have an entirely different wash pump setup - talking over 100gal/min peak recirc rate.
Given they are all fresh water, you don't have the issue with keeping hot water hot in storage for a few loads.
