StorageReview checked out the Lexar Professional CFexpress Type B Card
A quote from the article:
The next generation of professional cameras hitting the market, which means a significant increase in data due to higher image resolutions and color depth. Data transfer rates thus become more important than ever. To satisfy these needs, Lexar has released the Professional CFexpress Type B card, the company’s next-gen flash media specifically designed for these next-gen cameras. It supports both two lanes of PCI Express Gen 3 protocol and is native NVMe and features a durable and reliable build.Lexar Professional CFexpress Type B Card Review