If it feels like it's been a long time since Nikon promised the D5, D850, and D500 would get CFexpress support, it's because it has. The original announcement came in February of 2019, and today that promise is fulfilled.
It's been well over a year since Nikon revealed that the D5, D850, and D500 DSLRs would all be getting CFexpress memory card support "in the future," but users are still waiting for Nikon to reveal exactly when that future will arrive. Fortunately, it seems that wait is almost over.
If you've been wondering what kind of continuous shooting improvement you can expect from CFExpress over XQD, this video tries to answer that question. Put together by JANG HEE LEE, it shows the difference between shooting with CFExpress and XQD on the brand new Nikon D6 DSLR.