The biggest difference between the platform and tatami, in my opinion, is that tatami is more practical and can be made into a bed at home for guests or family to rest. But tatami takes up too much space. If only tatami is used to replace the bed in the room, the overall effect will be very good. Moreover, the design styles of tatami are varied, most of which are Japanese decoration styles, and the overall effect is bright and generous.
Personally, I prefer to sleep on tatami, because tatami is hard and has a good effect on people with bad waist. Lying on tatami in summer will feel cooler. In fact, both the platform and tatami have their own advantages and disadvantages. The key is to see if our family needs it. If the balcony at home is large enough, you can choose to install the platform. If there is tatami, I think the platform is also dispensable.
Because people's life is very fast now, there is basically not so much spare time to kill time on the platform. Personally, I just eat when I come home from work every day. After dinner, I will play computer for a while, or watch two TV plays, and then go to sleep. Only on weekends, I may have leisure, but the weekend time is also very substantial.