formatted /persist and /firmware

Hello everyone, last night i was trying the PhilZ Touch CWM recovery and in the wipe section it has an option to format /persist and /firmware, so being very stupid i formatted those partitions and when i tried to install a new rom i couldn't connect to wifi, i fixed that with this http://forum.xda-developers.com/moto...tooth-t2813308 and everything seems to work perfectly in stock rom, i must admit i was very afraid, but now i'm curious because i search a little and others phones have drm files or more folders (i only have a lost+found folder and to 2 more .bin archives) and i was wondering if any of you ever had done the same as me or know more about it and could help me if i'll have problems in the future for my stupid behavior. Thanks :o