I can think of a number of storefront Chipoltes or Smashburgers where tunneling might work but in a store that already has a drive-thru? Wendy's can dream about fully utilizing their buildings but at their volumes that's going to be a while.
At the same time, restaurant companies are discussing smaller locations and cheaper facilities with greater demand upon existing parking spaces. In addition, governments, Federal and local, will continue to push for EV charging stalls.
And then we'll wonder why dining room sales went to absolutely nothing.