I get that you don't like Microsoft but REMOVING NAPI support is a very bad idea. I get you are all about the new hotness but for many of us that are forced to use silverlight for education and dont have any other option means we will either have to move to Firefox or the horrid IE.
Google don't be stupid! you are just hurting yourselves and your users. even if you must kill off NAPI at LEAST support Silverlight. Many educational platforms REQUIRE it and will not switch for a long time. So think of the people that made you what you are and KEEP support for it.