While I strongly agree with old tailoring principle of "measure twice, cut once", I'd like to point something out. If older software had less known bugs it doesn't necessarily mean it had less bugs. We see years-old security bugs (Heartbleed anyone?), or even decade-old bugs discovered constantly. Software is expanding into people's lives faster than ever. As a consequence of software being used more, both the bug-detection rate and the bug-exploit rate will inevitably increase.
