Pretty bald to say that I love unsupported software. You base that on what? PHP 5 is still supported, but not so much longer.
We looked at upgrading to Froxlor already in 2014. That’s when my account was created. We didn’t upgrade for many reasons, one of them being time. Also, we had a well-running system, so why change that and risk running into trouble? Furthermore, we made some changes to syscp which we would have to make again to the Froxlor version of 2014.
And no, we cannot start from scratch. We have hundreds of mailboxes and websites.
Just an advice to you: if you don’t have anything substantial to add to a discussion, then just stay out of it. Better for everyone.