I bought a 75" samsung about 2 years ago that was higher end at the time. I've had all kinds of problems with it - wifi won't connect, remote stopped working, UI is so sluggish I have to reboot constantly. The picture quality is nice but I will never buy another samsung and do not recommend.
My Samsung from 12 years ago still works quite well, minus the original remote crapping out (Apple TV remote can turn it on and off). Was gonna keep them on the list when in the market for a new one, but if the newer models are crap, bummer.