I only know one person, i.e. client, photographer, assistant, that doesn't own an Ipad.
Not a Kindle, not a Samsung, just an Ipad, to the point the Ipad is almost a generic term.
Whether it's better than the rest is not important to me.
Most of us in the world of communications are deep into the Apple eco system (for better or worse) and it's just too easy to stay with the brand, rather than learn something different and start learning workarounds.
Don't misunderstand. I don't give a s**t but nobody strays from Apple that doesn't come back.
At least in my experience.