The only reason I do it is job security. I prefer to know a version of something inside and out, all the strengths and weaknesses. I don't want to spend the tim

The only reason I do it is job security. I prefer to know a version of something inside and out, all the strengths and weaknesses. I don't want to spend the time to learn something new if the current tech stack suffices - it's a risk. I'd rather spend that time building something. But if I don't upgrade/rewrite every few years, and I need to find a new job, the interviewees will look at it and think I'm a dinosaur - despite the fact I follow the latest trends through blog's and podcasts. My company is slowly upgrading all our application servers because what we were running is way past EOL. The ops team bitches and moans because the newer one is more unstable. Go figure.