FDNY reintroduced the "Super Pumper" concept in a somewhat different form a few years ago.

See:

https://www.firefighternation.com/lifestyle/new-fdny-super-p...

The article says the "super pumper" could supply 8,800 gallons per minute, and it came with three "satellite trucks [...] not burdened with a pump of their own"

Your basic modern fire pump unit can pump 2,200 gallons per minute (if you can find a water source that'll give you that much) and it'd typically have a crew of 4-5 firefighters on board.

So you'd probably replace it with 4 regular fire trucks? Then you've got just as much pump capacity, plus you've got the flexibility to send the trucks to different places.

Some interesting history here: https://www.firerescue1.com/firefighting-history/articles/th...

Better building fire suppression systems. Not to mention improvements to flame retardant materials.