>>So, what alternative are you looking at?
Our vendors who have explicitly stated they will not support systemd in any way (due to +Priv, DoS and bypass issues/concerns) have stated that they recommend either staying with RHEL6 & Oracle Linux 6 until it is no longer supported or switching to AIX or FreeBSD. Two of these vendors are financial software suites, one is a Point of Sale system and the other is a CRM Suite that "may support it in the future". What the other vendors plan on recommending is still TBD for them. Simply put though, many companies are more invested in their applications than any flavor of *NIX.
>>I don't know about how you write scripts, but I find it amazing that a majority of them has to be rewritten.
Have you not seen the number of changes in management, monitoring & configuration commands made within RHEL7? Seriously, it borders on being a completely new distro the way everything has been retooled. Many of our SysAdmin scripts are written in Perl & Bash with remote get for everything from deployment to monitoring and analysis (netstat? gone. ifconfig? redirected. iptables? gone. lsof? switches changed. chkconfig? redirected. So many more...).