Sure. I don't write any tests (luckily I don't work on a business-critical system), and 10% of my time is dedicated to fixing features that were broken accidentally. And now? 90% of my time is still dedicated to developing new features.
Don't bother feeding the trolls, r00fus it's a lego developer, if their framework doesn't support they will rebuilt everything from the scratch or mark it was wont-fix, for devs like him is that we can have nice things.