Hardware

Depends on your workload.

For most of what I do with sound, video and textfiles of various formats, single thread is not very relevant.

Occasionally you may want to convert a long audiobook that comes in a single file and audio is generally single threaded. But that is still only a minor inconvenience because it also converts in the hundreds of real time speed on a single core.

And if it was important enough, then it's totally possible to write scripts that divide the file in small portions to distribute amongst workers, exactly like it has been done for video conversion where much more compute is needed and this kind of scenario is more realistic.