One of the main reasons I started culturing them is cause I froze a couple cultures, so I make extra cultures, and keep them in different places.
I was taught a long time back, well, twenty or twenty five years back anyway, to never keep all my eggs in one basket, or you stand to lose them all. I try to always plan ahead and have a contingency plan when I do anything
If one room gets too cool or hot, the cultures in the other room may stand a chance of survival, so I do double cultures, and keep them apart. Don't want to have to starve, or chase down food in a pinch.
Now that my mantis' are too big, except for my budwing, I don't have any reason to keep so many cultures, so they've also dried up, alot of them.
I focus on the hydei, which didn't fare so well as home grown cultures for me as the mels did, and a couple mel cultures for the tarantula.
When I start any of the 4 chinese ooths I have I'll need more mels, but I can cross that bridge when I need to. I want to give the babies a head start at good survival chances, and kick them loose in the yard, and other places.
At 50's in the nights, and 70's during the day it shouldn't be long before the natural hatchlings come out to play.