Every major DVR that is sold/rented by cable companies are Linux-based; RedHat Enterprise Linux (RedHat's stock price passed MS last year, and their numbers have done nothing but increased even through the economic downturn); The BSY-1 and BSY-2 sonar systems are both Linux-based; ...the list goes on and on. And let's compare that with "commercial successes". The iPhone had a bug in which an attacker could take over your iphone by sending a series of text messages. MS Windows has created an entire cottage industry around antivirus and anti-spyware. They have also have vulerabilities in Windows that date back to Win3.1 that they will never fix. Apple had vulnerabilities in their wireless drivers. Instead of fixing it, they sent a legion of lawyers to threaten the researchers that found it. Sounds like the big boys shipped half-baked software too. The only difference is that you are out a bunch of money, and you are at their mercy as to when or whether they will ever fix it.