UV is such a big improvement that it moves Python from my "would use again if I had to, but would really not look forward to it" pile to my "happy to use this as needed" pile. Without disparaging the hard work by many that came before, UV shows just how much previous tools left unsolved.
It doesn't do anything differently beside the speed... Why do people keep praising it so much? It doesn't solve any of the real problems... come on. The problems weren't the tools, the problems are the bad design of the imports and packaging systems which cannot be addressed by an external tool: the language needs to change.