As a leader I did weekly department emails, weekly "office hours", fun video interviews with new hires to introduce them to the team and more. It worked pretty well, especially since the majority of the team had been working together for years. The piece I wasn't able to implement was getting the entire team in the same physical place every 3-6 months. However, I think even with all that, if I was a new hire, especially a junior, I'd still have a easier time learning the ropes in person. However, is that worth the massive constraint on hiring and impact on everyone else? I don't know. It's not a clear tradeoff.