Most likely wouldn't happen but im the type of person that burn in would happen to. my last Panasonic plasma which was a 2014 model had a nice ID channel logo burned into the bottom right corner . That's why this time I made sure to stay clear from any technology that's even slightly prone to burn in . Went with the fald led back lighting tech this time . My Visio P 65 puts out just as deep black as my plasma did but certainly has more of a pop to it .That's a valid concern. I've been working with a guy at "Video Only" for the last year and half, watching and testing out their display model of last year's LG OLED's.
This baby runs for hours and hours a day. We calibrated it in their 'show room', and made sure it wasn't set to the typical in-store show-room ridiculous brights/contrasts - but it was set how it should be set for optimal viewing. That TV's been used every day since then, running hours and hours of samples - some with logos that sit on the screen for a pretty long time.
Over a year now, and no burn-in.
Plus, some do offer an "anti-burn-in" feature which can help get rid of any trace burn-in. It's not perfect, but it helps.
Bottom line - if you calibrate it right, you'll probably never see burn in at all, especially if you are careful to not leave it on some static image for too long... but I get the concern. I've felt the same way... but I think LG has mostly dealt with that problem.
This set I have puts up the most fantastic picture I've ever seen in my life . Everyone that comes over my house agrees as well . I never really been sold on oled at all. I just don't see that big of a difference or the value. money was not an issue for me either when I purchased this recent set . Best 2k investment I have made . Lol