This could affect YOU if you have ESXi installed on SD cards !!!!!
e.g. DELL EMC have just issued a statement stating the use of SD Mirrored cards (IDSM) is NOT recommended for ESXi 7.x and later, despite that they sold the technology !!! and some DELL EMC R740 shipped with OEM pre-installed ESXi 7.x. using IDSM - Mirrored SD cards!
and now they do not recommend it!
NOTE: If you had ordered VMware ESXi with your Dell EMC PowerEdge server, it is preinstalled on your server. The ESXi installer media is required for reinstallation. The Boot Optimized Storage Solution (BOSS) card is the preferred non-HDD or SSD device for VMware ESXi 7.0 installation. The Dell Internal Dual SD Module (IDSDM) install is no longer recommended due to write endurance issues with the SD flash media. For more information, see the Storage Requirements for ESXi 7.0 Installation or Upgrade section on the VMware ESXi Installation and Setup Guide or see VMware Knowledge Base article 2145210.