We should be promoting threadpoolctl as a helper library to show what runtime dependencies are in use. The current show_config() shows the build-time configuration of the various acceleration frameworks, but I have never found that to be very helpful. We could instead use threadpoolctl to show what is currently in use. If threadpoolctl is not installed, we could display the help for show_config with directions on installing it.

This would help us debug user issues, as we could request the output in the issue template.