Extending Windows Shell with managed code

Question

basically, every SO stream related to the extension of the Windows shell (for example, display overlay icons or expand the Explorer context menu for certain files), strongly recommends using managed code for this. I understand the reasoning given at http://blogs.msdn.com/b/oldnewthing/archive/2006/12/18/1317290.aspx

My question is that these words of caution remain true when working in CLR4.0 environments. As I understand it, http://channel9.msdn.com/Shows/Going+Deep/CLR-4-Side-by-Side-In-Process-What-How-Why downloads managed code that uses different versions of the CLR into one and the same process (in this case explorer.exe) is handled more elegantly in CLR4.0.

Thanks so much for your understanding here.