Approx 5 months from now, my 2 Samsung LCDs will be 10 years old. A 46 in 1080p and a 32 in 720p. Both of them still play as if they were new and have needed no repairs at all. I will stick with them until something goes wrong. I have never been more satisfied with any brand of tv. YMMV.
I still have a working Samsung plasma that my parents gave me as a housewarming present back in 2008. It still works although I got a new TV with internet connectivity and direct access to many of the streaming services I use. The only issue is that I have some burn in. First there were the sides because I originally used it with 4:3 mode with a cable box. Later on it get better as I used full screen although I got burn in with a certain channel with their logo in the same spot for hours on end.
I rather like my new TV although trying to move app icons around is a pain to figure out. One time I just deleted an app and loaded it again so I could put it where I wanted on the home screen.