Is there any point buying a google pixel with grapheneos If im going to be using other devices that aren't privacy friendly?

I'm thinking of buying a google pixel phone and installing graphene os on it, but I also use a windows pc and an android tablet that uses stock os for studying. Is there any point getting grapheneos on a secure phone when Im going to be tracked anyways on windows and my android tablet? I also use social media with personal identifiable info which I want to do and wouldn't want to sacrifice that for privacy. Would the best way …

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