Well, I would believe that Adobe makes much more money off of their Creative
Suite of products than anything related to Flash. Especially when industries
rely so heavily on Photoshop, Illustrator, and Dreamweaver with each program
in the hundreds of dollars.
If Adobe would release the source code for Photoshop and or open sourced it,
then their potential business model would be threatened. Same with Microsoft
with Office. As someone said before, Flash is different because it was
offered as a free plugin that many sites use for interactive features and
video. The average Joe can do without Photoshop because it is not a
requirement to watch a UFC fight or ESPN video on the internet. Flash is.
We have seen many examples of sites that used HTML5 instead of Flash for
interaction like that Arcade Fire experiment by Google. The problem with that
is we still have to wait for the popular browser to support all the features
and the ancient ones like IE6, IE7, and Firefox 3.6 to be completely phased
out of existence.