Hey Steve,
Rich D’Angelo (on behalf of MacVideo Promo) here. I am the one who responded to you via e-mail.
The last major upgrade was version 2 in 2011. Since then, there have been a number of compatibility updates, mostly to accommodate new Mac OS versions. I expect there will be another one for macOS Sierra.
So, while it is true that Media 100 has not been “actively developed” for several years, I would not write a eulogy. Boris FX has no plans to discontinue offering Media 100.
In respect to the Media 100 release for macOS sierra, there should be some news early in the New Year. Stay tuned.
Best regards,
– Rich