It's not new. You found hot water, but congratulations!
From a commercial point of view, however, it is better to sell ink cartridges.
If so far you bought 6 or 1 x 750ml, now you have to buy 6 x 3l - 18 litters, or 60 litters 891.
Third generation ink is better than first and second. The temperature in the print camera replaces the need for the optimizer. Rather, the optimizer in the third series replaces the temperature at 25 and 26500.
Congratulations if you were able to bypass the chip system. It's easier to just change the chips. They are not expensive.
The rest is just gravity.