I think you're probably right. Not all, but certainly some are. Partly they found out they could make better margins during the pandemic, and possibly the fact that people are unwilling to come back to work ("server shortage") has been a catalyst to get the restaurants to either end dine-in services or to invest in automation. Automation at fast food and fast casual places, once in place, is likely to stay. I'm not so sure about dine-in though. I think it's temporary and soon the pandemic won't be a convenient excuse. When the place across the street is offering dining service and you aren't that eventually becomes a differentiator, in a bad way. Honestly, around here I haven't noticed many, if any, places that have kept dining rooms closed because of the pandemic. But I only eat inside a fast food restaurant maybe once a year...usually drive through if I do it.