Yeah my boomer dad (materials scientist in the civilian nuclear sector) disagrees. He's been working from home (and from vacations sometimes...) at least a few days a week for quite a while now, and his old boss was apparently saying that they were going to need to hire 3 people to replace him when he eventually retires.

FWIW I also know some elder millennials who are against it, but I've seen how they run their business and let's just say I wouldn't take advice from them.