I thought the Sony was an LED TV, I did say I bought an OLED (apologies if I am wrong about the Sony). Also I read that Sony 3D TVs suffered from 3D flickering issues, and I almost always have bad experiences with Sony products.
I bought an LG, a 55E6V. It was from an old (late 70s) couple that had everything apart from the box, and it was in immaculate condition with a year of John Lewis guarantee remaining (not that it will help if the panel goes, I believe there are no 3D panels now). The LG glasses are cheap rubbish, I bought some Polaroid ones on ebay and they have improved the 3D experience. I paid £700. Someone at work raised an eyebrow, but the TV cost over £4000 new. Also, if you want a 4K OLED 3D TV, you aren't going to find many bargains, unless you want one advertised with 'slight screen burn'. Thanks to coronavirus I had the money (working but not going out anywhere!), so I bought it.
I'm wondering what to do with my old Panasonic plasma now...