https://www.theregister.com/2023/09/14/cisco_discontinues_hyperflex_hci
Despite some sensasionalist writing like "To Nutanix go the spoils, to VMware users comes a compatibility nightmare" (which is the The Register house style), the articles contains useful links like an FAQ and migration whitepaper. In all, I am not too surprised, with the relative small market share of HX.
I am curious how long it will take take to have HX content remved from Cisco U, and/or replaced by Nutanix content.