"We’ve shifted to cloud...we’ve been eliminating monolithic applications one after the
other after the other...we’re moving to a zero data center, zero mainframe
environment that’s more flexible, secure, and cost-effective."
https://www.pcmag.com/news/fedex-to-stop-using-mainframes-close-all-data-centers-by-2024
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Despite the move to the cloud, IBM, the last major manufacturer of mainframes,
continues to release new versions with attractive features like improved fraud
detection. Still, like other parts of IBM, the company seems to be two steps behind.
https://www.protocol.com/newsletters/protocol-enterprise/mainframe-fedex-cloud-china-asml