^^ The JU6700 is Samsung's cheapest/worst 4K TV, 60Hz panel, no HDR or WCG support, no local dimming, not a great TV...
I've had four plasmas, all Panasonic (G20, VT50, ST60, and now ZT60), and have never had a problem with IR on any of them, but then again my viewing habits are probably not conducive to IR. I don't watch much 4:3 content, don't play video games, don't watch sports, and use the TV sparingly. I pretty much only use it for 16:9 HDTV shows through my Apple TV and Blu-Ray movies. I just checked it and I still only have 1,925 hours on it since November 2013.
On the other hand, I gave the 50" ST60 to my mom who, by AVS standards, abused it. She'd watch a lot of mixed content from DirecTV and Netflix movies, and a fair amount of 4:3. Worst of all, she liked watching it in Vivid. She ended up giving it to my brother. Before she gave it to him, I wanted to check it out because I was sure she had ruined it. She had about 3,000 hours on the panel. I popped in an SD card with some color slides, and to my surprise, the TV showed not a single hint of unevenness, burn-in/IR, logos, etc. So to me it seemed like while later generations of PDP were more prone to IR than older ones, the susceptibility seems to vary from sample to sample for whatever reason.
In regards to not wanting to buy a "high-end" TV, I think that we often draw a false correlation between cost and longevity. We all know a high-end/high-cost TV will have a better picture than a lower end one, but I think the assumption that a more expensive TV will be more reliable does not really follow. It would be nice if it were true though. Case in point, last week, I'm dusting my ZT60 and notice that I'm starting to get the panel separation issue in the upper right hand corner of the TV (see picture). A bit of a bummer for a babied flagship TV with all this fancy talk about autoclaves, but the picture is still amazing...
Not to hijack the thread, but does anyone know if the separation issue on the ZT60 gets worse or affects the picture in any way? I am still under Geek Squad warranty but not sure if this would be considered cosmetic (not covered). And if I used the warranty and they cashed me out, I'm not so sure I'd know what to get. I think the current crop of OLEDs aren't the holy grail we'd all thought they'd be. The best LCDs have less compromise to me, so something like a Sony X940D would probably be my choice if I could make it fit. The Panasonic DX900 seems awesome but I don't know if we'll get it here (even if we did get it in the US, Panasonic doesn't seem to like selling their TVs in stores anymore).
movies Sony 65A1E|Sonus faber Toy, Toy Center, Venere Wall|SVS SB2000|Sony ZA5000ES|UDP 205/UB820|ATV 4K
music Sonus faber Liuto|REL S/5|Sony A1ES|Wadia 321|Sony SCD-777ES|Sony PS-HX500|Sonos Connect|AQ Niagara 5000
desk Sonus faber Toy monitor|REL T-Zero|Rega Brio|AQ Dragonfly Cobalt/Victoria|Mac mini|AQ PowerQuest 3
living Sony 65Z9D|Sonus faber Chameleon B|Marantz NR1508|Panasonic UB900