Snakemake version
8.25.2

Describe the bug
Requesting threads > the number of cores apparent to Python for a remote job, e.g. in a cluster context, will throttle the remote job to the number of cores on the submitting note, if --cores is unset.

Logs
Can be supplied upon request.

Minimal example
Any workflow with thread number > number of cores apparent to Python available on a cluster head node.