https://www.cnet.com/news/lg-oled-tvs-dont-mess-with-success-in-2018/

If you bought an LG OLED TV in 2017, buyer's remorse probably won't be an issue. 

And if you're waiting for a final round of price drops on a 2017 OLED TV, perhaps timed for the Super Bowl, potential buyer's remorse is not a good reason to wait for the new versions, IMO.