Contrary to popular geek mythology, people working for MS are not stupid. Some of them may be ... ethically challenged, but stupid they ain't. And intelligent knowledgeable people like to use the best tools available for their job, which sometimes means using perl. And intelligent managers say to their intelligent peons^Wemployees "OK, you can use perl, because it will mean you do more work and make Bill more millions".
Note to self: stop replying to trolls.