For now runnvda.bat (python) has been removed, and runnvdaw.bat (pythonw) has been renamed to runnvda.bat. Thus, the recommended (and only) way to launch NVDA from source now is via runnvda.bat, which will not block. this is most similar to the original way of pythonw source/nvda.pyw.
We may re-introduce another batch file perhaps called runnvda_console.bat in the future, but only when the console association issue is addressed in a separate pr.