Sure. There was the decision a couple of years back to stop using self signed certificates. I spent a couple of hours wondering why a server I was running that compiled SASS on deployment suddenly stopped working, and it turned out to have been this.<p>A more recent example comes from Zombie, which I use for functional testing. When they moved to v3, they required io.js instead of Node. So eventually I decided to go with Zombie 3 and moved to io.js, but then another library broke which required Node instead of io.js.<p>They&#x27;re the two big ones that stand out, but there have been  lots of other small annoyances.