They walked that back after not even 2 weeks, just too many unhappy customers.SD Card and USB boot no longer supported in ESXi 7,3+ . You need an HDD/SSD to install the newer versions.
its still officialy supported for 7.x/8 if you do SD/USB + secondary storage for the write intensive stuff.
(that is the general recommendations to do for a regular drive also.)
If i dont remember too wrong the tbw for ssd is 300 minimum recommended, i know production enviroments doing 1000+ tbw SD cards.
But its frowned upon if not moving parts onto secondary (as in vmware support will still help you but remind you its a bad idea).
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