It's not really a matter of "who needs [a list] nowadays?" Such a list will actually be useful for lots of users. (May there be lots of users!)
While most people may indeed be familiar with standard Win shortcut keys (e.g., Ctrl-Ins, Shift-Ins), it's still helpful for newbies to mention that.
In addressing AS for the first time, my experience with dozens of word processing programs teaches me that like all the others, AS will have a unique list of shortcuts. I might discover the presence of those OS-dependent assignments, but I can learn a lot about a new program from a quick look at the keyboard shortcuts. If there isn't one, I just remain uninformed. Who would assume that OS defaults are the only shortcuts used? It isn't immediately obvious that Ctrl-+ produces a weird subscript, and Ctrl-Shift-+ produces superscript. These, I suspect, are features of the RTF lib being used. Others, like Ctrl-G (for "Go"?) are purely app-specific.
I really appreciate your going to the trouble of producing this PDF manual, and I look forward to its continuing evolution alongside AS itself. Also, since printed communications lack emotive dimensions, I hope these remarks don't seem in the least bit negative. They were written with a friendly smile on my face . . . .