This sounds bad.
My use case would have been using arrays in ash but I only found this: Arrays in ash shell?
Since the post 2 years has passed, does ash still unable to handle a normal array? I mean not with workarounds found in the mentioned post.
BTW, if I install bash and use #/bin/env bash as a shebang in my scripts, then my router won't be bricked and my scripts' functionality will be expanded, right (I'll be able to use everything bash is able to)?