Imo practical and useful toughness in today’s NHL means finishing checks, being hard on the puck and not backing down when challenged whether it be for a puck battle, a foot race, a fight, etc.
Going around making questionable hits or face washing someone after every play isn’t useful at all anymore imo.
Look at Vegas. They’re not in your face physical but they’re hard to play against because they’re relentless down to a man. Even Boston without Marchand running around like a moron, they’re not throwing elbows and fists all the time but they’re tough because they never stop or show weakness.
This, more than anything, is a coaching issue imo. You can add guys who naturally play that way but you can also coach everyone else into that mentality if you have a good leader behind the bench.