The company that produces the Queen of the Skies conducted a survey several months ago asking who uses what - FS9 or FSX.  There were many hundreds of respondents and the significant majority uses FS9 and has no immediate plans to go to FSX (for varied reasons).  I'm one of those who will remain with FS9 with no plans to migrate to FSX.

It's a shame that CS abandoned the 757 before it has released the patches to make it a viable add-on.