Is it a good idea to install recommended updates

I'm running linuxcnc on the Debian Wheezy distro and don't have any complaints at this point it does what it is supposed to do and I have yet to discover any bugs or glitches. Every time I boot up the computer Debian asks me if I want to install the recommended updates, I understand the updates affect many packages that may have security or stability risks. If this were a computer that wasn't running specialized software and hardware with dozens of hours of configuration I wouldn't hesitate to install the updates, but I'm hesitant to install updates that might break linuxCNC. I know the community is pretty good about reviewing and testing updates before they are released, is my fear of updates baseless paranoia or are updates something I should ignore in this case unless I have problems?