At that point, there are no benefits to using Fox, unless you want to limit your career posibilities, continuously have to defend your choice of tools to potential customers, don't want your phone to ring with calls from recruiters.....

If your marketing is based on "tool experience" - then what you say is important. There are developers that get work without even discussing the "tool". Some get work that will require new technologies they've never heard of.

Some people get work because they have a reputation for delivering value. Others get work because "tools" are important.

Remember - it's not the size (or "brand") of your "tool" (giggling reference to NETs minimum object foot print and redmond's buffet evangelicals "performance" anxieties regarding DO(n')T NET) - it's how you use it!