It's really frustrating when you need to fix old code and the dev environment is gone. Some of that stuff just isn't replaceable, or it's a whole bunch of extra work, as you had to do to get back to square one.

It isn't 100% clear from the Voyager documentaries how much of the dev environments were destroyed/lost between projects being canceled. I tried to get the Voyager source but it isn't classified as a government record that would be subject to FOIA, which is frustrating. (nothing to do with security, just IP)