No, because I know I'm using plain vi :D. I spent a good deal of my life working with plain vi, and the company I work for makes a port of POSIX APIs, UNIX shells and all typical command line utilities for Windows, which includes vanilla vi. So I'm used to it.

I use VIM with only a few extensions (taglist, command-t and snipMate). I also use ctags and cscope, but support for those is built into vim. I really try not to get too dependent on extensions. They are more like convenience rather than something you don't know how to do without. Command+T for example is useful, but you still should know how to get to your files from the command line.