I find that to make remote work, people need to be good at written communication. While people can obviously have as many video chats as they want, even 4 hours

I find that to make remote work, people need to be good at written communication. While people can obviously have as many video chats as they want, even 4 hours of video chat every day is not the same as being in the same room with a person, where you can simply turn to them and say, "Hey, can I ask you something?" And if you have people in different time zones, then the asynchronous nature of email becomes very useful. But people don't like to write. This initially surprised me because I love to write. But many people don't. Even people who went through great colleges and who must have written many papers -- they hate to write. I notice it most with salespeople, who are very extroverted. They are good talkers, they feel like they are at their weakest when writing. In many startups it is crucial that there be good communication between the sales team and the tech team. And if the salespeople feel they are best with verbal communication, then that is a good reason to get everyone into the same room together. Not every startup needs a sales team, but some do. If you have a product that will be sold to enterprises, then you need a sales team. And most of your feedback, about what the customer really wants, will come through the sales team. So the tech needs good communication with the sales team. So there are some problems with remote work which I don't think will ever be solved.