This has been discussed here before. I sincerely regret that large downloads are a hassle for you, as they may be for some other people. But for the vast majority they are not much trouble at all.
The economics of DVD distribution no longer work for us. The combination of much high postage rates for media mail during the past year or so, increasing production and distribution costs, postal delays (especially into the US), lost and misdelivered mail, etc, etc, all make DVD a much less attractive medium for a company our size.
Online distribution of media is the future (and for many the present). There's no going back. We will continue to deliver the Video Journal on DVD to our existing base that have pre-paid for it, but by Issue #20 will terminate that format. The days of mailing plastic are nearing an end.
Our video tutorials will be delivered exclusively via download.