Re: "the Linux Kernel was only created in 1991"
The fact you did something with Linux in 1998 didn't make it a useful tool for everybody. Believe me, there were people who actually used Windows 2.0.
Until kernel 2.6 Linux had several shortcomings in many areas - i.e. threading and memory management that hindered its use in large applications. Feel free to tell us what your "commercial deployments" were....
From kernel 2.6 onward Linux made great leaps.