To give you some background, we are an IT shop for an Energy co. so there is a big chunk of our people who have to be at work, physically just because of the nature of the work. As others have alluded, we weren't set up with remote in mind.
I would love to hear how being 100% you've built a network, bonds etc with your colleagues. We have a bunch of new people who dont have the rapport with us or finding it difficult to connect ( a few lunches or coffees, or hang out in the common area could help build )
I should also mentioned the 3 off / 2 in office is something of a peace offering to the non IT part of the business. Most of us know we can be fully remote.