The proliferation of lemmings is a possibility. Let me ask you something - suppose you're interviewing for a job. and you learn that the company is moving from VFP to .NET. They cite to you their reasons (want to take advantage of the .NET platform, more .NET developers out there, MS is investing in it, etc.)
Or your employer announces that they're moving to .NET.
Are you going to give the same response? Are you going to play the Lemmings card with them?
Kevin