Men who don't want children, what's stopping you from getting a vasectomy?

Men who don't want children, what's stopping you from getting a vasectomy?
I got mine for my 30th birthday last year. Never wanted children, neither does my wife. My siblings are 7yrs old and 3 yrs old... So theres a good chance of me having to take care of them later in my life.

But the vasectomy has $90, and took about 45mins to complete. I was walking find the next day and probably the easiest decision I have ever made for my health.