Not to brag, but I have some knowledge about everything Sitecore 🙄🤣. I’m not saying the knowledge is substantial by any means, but it’s something more or less😆. For example, today, July 28th 2017, I know very little about the Sitecore Print Experience Manager and the Email Experience Manager. However, I know how to install it! That little piece of knowledge is going to eventually grow 🤣. There might be some other products or modules that I have neglected, but the largest area is Sitecore Commerce.