Nowadays tablets are getting extinft due to the modern phones which can perform all tasks in daily life, but their are some major use of tablets evwn in 2020 like using multimedia ( watching movies, etc) , You can use it as an ebook reader which is way more comfortable than reading in a normal smartphone. According to my opinion , samsung tab like s3 are the best you can buy for multimedia but if you need for reading books I suggest you to get an amazon kindle, if it is for the sake of productivity and smooth experience, apple eco system , just grab an ipad.
Thank you