Well they are enjoying it a little. I mean, netflix is based on silverlight. Netflix is really heavily used.
I really wish people would stop saying this. My iPhone streams Netflix, my PS3 streams Netflix, my Wii streams Netflix; Silverlight has plug-ins for OS X and Windows (and Windows 7 mobile I would imagine).
In any event, the issue is not that Flash is made by Adobe and that they suck (though it is true) or that Silverlight is made by Microsoft and they suck (they kind of do, but Silverlight is actually reasonably good). The issue is that they are third party plug-ins for a fixed number of platforms. By its very nature the web is most valuable to users when it is ubiquitous. With the explosion of mobile computing, it is not reasonable that
any company (Adobe, Microsoft, or Apple) is going to successfully and stably port a plug-in that has to support so many browsers, browser versions, operating systems, operating system versions, form factors, hardware limitations and optimizations, etc.
Apple adding yet another third party plug in to the crap pile is just a bigger crap pile no matter how good it might be. If you're doing something on the web, then do it with the web standards and let each device/system/browser proprietor deal with making its product conform to it rather than the other way around.