OLED for Gaming and Office

Hello, I am considering purchasing the XG27AQDMG. However, I currently have two concerns, and I hope that someone has had a similar experience or faces the same challenge.

1. I also use the monitor a lot for office tasks, such as coding or Word. During longer sessions, many elements are permanently on the screen. Is that a problem?

2. I also play WoW a lot, and there are elements that are there 24/7 during the game, such as the mini-map or attacks. Is the chance of burn-in much higher with games like this?