OBIO, nobody blames you for staying with FS9. And as far as I know, nobody using FSX ever blamed any FS9 user for staying with FS9.
You have your computer, and just like me you are probably more addicted to freeware than payware. Your computer runs FS9 very well and cannot run FSX. Where's the problem ?
You have tried FSX and you saw nothing that pleased you, which is understandable taking into consideration the kind of quality that your computer may have been able to deliver in FSX. The choice of addons for FS9 is huge, so I don't see why one should worry about the fact that he has to stay with FS9.
Those who moved to FSX had their reasons (I'm not talking about the people that started directly with it, with no experience at all with FS9 before). It may be for the sceneries, it may be for the complexity of the aircrafts, it may be for other features or reasons. Some of them continue to use FS9 for specific tasks, and FSX for other stuff. I don't see why there should be "fighting" about that.
The only things to avoid is trying to claim stupid and incorrect things about a sim or another.