Again, that's a common misconception. Linux is a minor player on the desktop, but dominant in servers which is where the really valuable data is and in large quantities. For example, over 90% of financial records worldwide are on Linux or Unix servers.
Not sure where you are getting your statistics from.
Sure, we have a few CentOS boxes here. Many government organisations that I have been contracted too will have the odd Linux server. Having worked for major American electronic payments companies, I'm aware that there is a lot of Unix out there. There is also a lot of (believe it or not) mainframe still around too. In fact, one company I worked for (that I legally cannot mention) had all their high end customers on mainframe because for them it was more reliable than any other platform.
But throwing Linux into a "Linux and unix" category simply means linux is stealing Unix's statistics. Linux is not Unix and its unfair to lump it in. Sure, its designed similarly and uses the same commands (because Linux is a unix clone) but from a relationship perspective, Mac is more Unix than Linux. Most Unix stuff will not run in Linux and vica versa. They are not synonymous.
So no, 90% of the worlds financial information is not "on" linux boxes. In fact, probably none of it is, because generally the organisations that have the bigger proportion of that data don't store data on servers anyway. They have SANs for that.
I know you love Linux. I do too. But lets not paint a false picture. Linux is not unix. Linux is out there but almost exclusively on multi platform domains, meaning if you attack Linux, you still have to attack windows to do the damage. Almost all single platform domains are windows. This makes attacking them not only easier, but more "rewarding".
Don't get me wrong, it certainly is much harder to infect Linux. Added to that, spreading viruses is hard too see every distro has massive proprietary elements. For example, there may be 3-4 different installers for one application to cover every distro. So its hard to write a virus that is inter-distro compatible. This makes it less of a target as its significantly more effort for significantly less gain.
I do specialise in IT support, although not directly in Linux but much of what you are citing as misconceptions are actually opinions based in experience. I may not be as technical as other members of this forum, but I do have a real understanding of blue chip, financial, government corporate IT systems as well as those of technology development companies too. It's not like I'm just plucking opinions out of the air.
The company I work for now deals with software built on Linux platforms. The Operating systems we produce surround linux kernels. Linux is our bread and butter.... but 75% of the organisation (excluding firewalls) is windows.
