The best thing about keyservers is that it's very easy to use, you can easily share your files with other people without having them download anything or install any software! It also has an option called "share" which allows me to send my file directly from one person to another by just sending their email address (no need for downloading).
Sometimes I have trouble uploading large images but they are usually fixed within minutes of contacting support via chat/email. If someone sends you something as well important like a password reset link in an e-mail, then there isn't much you could do if it gets lost because no way to retrieve it after all? You'd be better off using Dropbox instead since its free and always available online regardless of where you're working remotely at times when your internet connection drops out while trying upload some big image. Sharing passwords between team members.