Exactly. CF Express is actually coming faster thatn I thought. I bought 64GB XQD for my Z6 and I cannot believe the speed of flushing the buffer memory. People pay huge amounts of money for their new cameras and still try to stick with their ancient cards just because they have it. Last week a friend of mine was saying her D850 was too slow and locks frequently. I went into menus, tried to reset things, checked firmware etc... but it was still slow. Then I saw that she was using an old SD card (45MB/sn). I asked her to buy 64GB Sony XQD card and now she is so happy. Even a faster UHS-II card would be good but price of XQD cards keep falling day by day and the difference isn't huge even today.In the UK too
Sandisk CF Express Extreme Pro 128GB 1700MB/s Read Speed, 1200MB/s Write Speed @ £299.99
Sandisk 128GB Extreme Pro SDHC Card 300MB/s Read Speed, 260MB/s Write Speed @ £265.00 reduced from £325.99
These UHS-II cards are really expensive for what they bring.