Thinking of downgrading to Cox TV Starter

I have a Roamio Plus and currently subscribe to Cox advanced TV with movie pak for $90 a month. I want to downgrade to starter TV which is $24 a month since we mostly do streaming. Is there anything I need to know before doing this? Like, will my cable card and tuning adapter stop working if I no longer have Advanced TV or something? Anything else I should know? Thanks