I have looked at SWAY for two weeks now, read the communities comments, and considered the Microsoft feedback.
I am in healthcare, and all of the security and access that goes along with that. I most appreciated the questions that focused on where the 'file' is stored. I'm going to assume there is some file, somewhere, in some format. I too need 'control' over the content and the work product. If someone needs to ask what I mean by 'control', then step aside and find someone else to reply. My desires; 1. Use SWAY just like every other Office product meaning I install the app (or 365), tinker for a while, and create a file. 2. A file I store, where I want to. 3. A file just like .xlsx .docx .pptx .vsdx. 4. I will never ever use this application if these three things are not met.
I own my content, period.