Strange feeling about farewell email

I have some uneasy feeling writing up the farewell email. In fact, I was originally thinking of simply sending out a message with one line saying "Bye" to everyone I know of and that's all. The way I see it, if I am real friend of you before I leave the company, I should already have you email address and/or phone number.

And if I didn't have your phone number and email address before, you probably will never email me or call me even if I put all my contact information in my email anyway.

Still, for the sake of not pissing off people unintentionally, I did the email anyway.

And then something totally unrelated: I am still support the production deploy at my second last day, which is good. The last thing you want to being force to go to workplace and have nothing to work on (but then for some people that would be heaven).