McDonalds was that and more first. They established the template that In-N-Out continues to follow, as anyone older than ~30 remembers.
McDonalds chose to aggressively enshittify, In-N-Out did not. You're probably right that McDonalds will never be that again, I don't think they even want to. If you cut minimum wage in half today, they'd keep the same staffing levels and the franchise owners would pocket the difference.