It is still a thing. I pick up old books (used or digital) as most historical, cultural aspects of a place remain the same. Some of the place recommendations might not be accurate but you have google for that.
Few ways I use it:
• To plan itinerary of my long trip
• To discover off beat places
• I used to travel without internet connectivity between 2014-2018. I used to use their hostel/hotel, restaurant recommendations for many smaller places as I backpacked
• If I have a base around a major city for a long duration, these books give lots of smaller places you could explore over a day or two every weekend
• It also comes with many book recommendations that you could checkout if you are slow traveling
Other things:
• Few popular blogs that come up in search
• Youtube videos
• Forums with longish threads (typically many years old)