on a tangent, being in the video industry, for me to see a file only in the hundreds of MBs wouldn't even get my attention. it's funny how used to the boiling water one gets when it happens slowly. of course a PDF is not a video file, so maybe something would feel hinky???
sending files over email is just extremely common, staying lower than 15mb is almost a requirement to facilitate easy communication in many businesses
Also, I tend to have OneDrive sync my active projects, including the steerco and update slidedecks, to my iPad, to read on my iPad when travelling or commuting. Small decks are so much more pleasant to deal with, and can easily sync over a mobile connection