(IMO) for tablets, it's the iPad or nothing (although my last tablet at home is a month old Galaxy Tab)

MacRumors Buyer's Guide: Know When to Buy iPhone, Mac, iPad

For me, it's basically to consume media content - Netflix, Amazon Prime and YouTube

Why I bought an Android Tablet - I was looking for something for Netflix, bought a new (2019) Galaxy Tab 10.1 for S$300 (8 inch version is S$100 cheaper) compared to the cheapest iPad at S$499

iPad has better app quality, longer lifespan (iPadOS will support the iPad Air 2 which was released in 2014!)
iPad also has FaceTime

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Biggest factor me is the answer to this question... How many times do you open your laptop to check on something... How many hours do you spend on your phone?

A tablet will reduce your phone screen time and (depending on your settings) will make your reading and watching more peaceful. (my tablet has no email and IMs). It also takes the hassle of waiting for your laptop to boot.