What are the biggest friction points in working remotely?

Poor documentation. Remote work is async work and requires solid collaboration around written communication and I have seen this lacking with firms

Communication. Remote work is great for focused individual work. But anytime you need to brainstorm or you get stuck or need to talk to the team. Things get tedious. I think it is also a case of tech not having caught up yet. Simple things like whiteboards are hard remotely. Plus you miss out on social interactions where you might chance up on new ideas.

Less of a cohesive team vibe. I have been working remote managing a team for awhile now, and occasionally we come into the office together. There is a huge difference in the quality of communication, the team bond, and the overall comeraderie when we are actually in the office together. Also, as many have said being fully remote creates a lot of meetings that could otherwise be very quick chats.

Personal life problems..

In office environment, a person can't get bored. If need help, he/she can ask the colleagues right away. In remote work, There are sometimes noises of the family when having a meeting, etc.