Allow messages while uploading file.
Please allow me to continue to write messages to people while I upload media to them. It was absolutely insane that I could not chat with the person I was sending a file to while the upload was happening. I couldn't answer their questions, so I had to switch over to Slack to communicate while we waited for the file to upload. Inane. I get that you like doing this "choose the file, wait for the file, then add a message before sending" thing, but other ideas suggest dropping that "feature" and instead just make files a separate "stream" in the chat experience. But, like, leave them there -- don't add a new "tab" for the love of everything UX -- but let the conversation continue. Thank you.
Nathan Wells commented