Or just code that works and nobody wants or needs to spend money on changing. I've written such code, very crappy stuff. And then coming back to the client many

Or just code that works and nobody wants or needs to spend money on changing. I've written such code, very crappy stuff. And then coming back to the client many, many years later, finding it all just humming along, driving their business critical applications without it or the computer it runs on ever having been updated once in 5 years or so. I was so surprised, and a bit scared. Sometimes when you don't change anything, it just keeps working. So I guess that makes it a very boring: code that can't be read won't be changed and will not be relevant for long, but not always