DMDv4 is a independent blockchain its not affected if ethereum explode whatever that means
as we use a total different consensus mechanic and dpos ruleset

i guess u mean some ethereum critical bugs that lead to network issues when u say explode?

as said above many codeparts are very different its very likely that if ever such a critical bug happens on ethereum it wont affect us as we dont use that code part our consensus mechanic which secures the blockchain is 100% different to the logic ethereum or even ethereum2 uses