To stay on analogies, it's more like GNU and Linux.
Vanilla Redux on its own is like Linux without an userland, so you have to implement yourself.
Redux Toolkit is a proper Linux with GNU userland. It's ready to use, and people can even use each other's computers without reading through the source code!
It doesn't make a lot of difference for smaller projects, but the thing about Redux is that as soon as you have 20+ or 30+ people working on the same codebase you get a hodgepodge of different patterns and structures. Toolkit solves it.
Vanilla Redux on its own is like Linux without an userland, so you have to implement yourself.
Redux Toolkit is a proper Linux with GNU userland. It's ready to use, and people can even use each other's computers without reading through the source code!
It doesn't make a lot of difference for smaller projects, but the thing about Redux is that as soon as you have 20+ or 30+ people working on the same codebase you get a hodgepodge of different patterns and structures. Toolkit solves it.