Yes, it's great in stir-fries.
Swiss chard - braise the stalks separately from the leaf, cut into 3" lengths. I only really like them with cheese sauce. Or the young ones can be used with dips, like celery, only they aren't anything like as strong, so excellent for people who don't like celery.
The leafy part is then cooked in all the ways you would normally cook spinach. So holes don't matter at all, just cut the stems out neatly, wash and cook the leaves in a little water and oil for a minute, take out, chop very finely and drain well, fry in butter with finely diced onion, salt and pepper and add a little nutmeg. Or stir some cheese sauce into it.