Potential enhancements after dropping python 3.7

[sklam]

There was a suggestion on dropping python 3.7 after Numba 0.56 release. This issue keep tracks of potential enhancements after python 3.7 is dropped.

The following list will be expanded as needed.

• use vectorcall for reducing Dispatcher call overhead. This has proven to be useful in nanobind (https://github.com/wjakob/nanobind#dependencies).

[seibert]

With Python 3.8, we can always use theimportlib.metadata module that is part of the standard library. That let's us drop a dependency, and likely results in more consistency. (See 169d106 )

[seibert]

Are there interesting compiler-related uses for https://peps.python.org/pep-0578/?