We like Visual Studio very much, and try to adopt new version earlier.
For the last time our VS's use pattern is centered around xml and xslt. In our opinion VS 2008 is the best xslt 2 editor we have ever seen even with lack of support of xslt 2.0 debugging.
Unfortunatelly, that is still a true when VS 2010 is almost out. VS 2008 is just 2 - 3 times faster. You can observe this working with xslt files like those in languages-xom.zip (1000 - 2000 rows). Things just become slow.
We still hope that VS 2010 will make a final effort to outdo what VS 2008 has already delivered.
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