What are the implications of not having an Emergency Disc/Rescue Media
The point of an emergency disc (any version of back up software) is to have a fail safe against the system refusing to boot into windows… malware, bad sectors, broken partitions etc can all cause a windows boot to fail which makes it hard to perform your tasks.
A system recovery disc (USB, hidden partition on the hdd, network work access location or old school (actual) disc) can be inserted to allow the system to boot into your backup software and browse the remaining locations looking for a previous backup file that you can recover the system to.
Having no rescue disc option at all is not a good idea for anyone (pro or home user) with windows systems…