Here’s a different take: if you find yourself needing to sort a lot of data all the time, maybe you should be storing it sorted in the first place.

Stop faffing about with college text book solutions to problems like you’re filling in a bingo card and use a real database. Otherwise known as Architecture.

I haven’t touched a radix sort for almost twenty years. In that time, hardware has sprouted an entire other layer of caching. I bet you’ll find that on real hardware, with complex objects, a production-ready Timsort is competitive with your hand written radix sort.