motub why did you install Linux?
Probably in the end my answers will be almost the same as yours.
With my needs I could still be on windows 98 or still using winamp 2 instead winamp 5, it would be less good but it would still work, so why upgrade to Windows XP or change to Linux? Because it is the human nature to want to have the latest and/or trying to improve things that aren't really broken.
I'm not installing Linux only to have a shine penquin, I think I will gain more control over my computer switching to Linux and learn more what is going on behind the GUI, also as I said previous I'm getting a server probably later this year that I will probably have linux on.
That doesn't mean you are wrong in your concerns and warnings, it will come times I will probably regret my decision, but no matter how things go I will probably learn one or two lessons at least. I have to use my head though so it won't be very costly lessons however.