[rgblambda]

I don't know if it would help or not to mention that the existing system helped to get the company to where it is today, when delivering the "now is the time to get rid of this" pitch.

Acknowledging how long the existing system has been live would hopefully be a reminder that you're not trying to erase their achievement.

[darkwater]

It will help, but the receiving party has to be reasonable enough (or "emotionally mature" enough) to fully grasp it. It's usually not the case with people that go nuclear on these topics.

[hinkley]

I haven't quite had 'nuclear' but I know what you two are talking about. "But we would have gone out of business 3 years ago if that weren't written!"

Yes. Three years ago. And it's not three years ago.

[darkwater]

"What brought you here won't bring you there". As cheap psychology as it might sound, it's actually true most of the times.