Isn't that little headphone port a combo optical/electrical port that you can plug either headphones or mini-toslink-whatever into ? Isn't that what it was bef

Isn't that little headphone port a combo optical/electrical port that you can plug either headphones or mini-toslink-whatever into ? Isn't that what it was before ? I swear I had previous mac minis with a combo port like that ... why would they not continue that ?