I often get asked what can be changed in a vSAN Ready Node”. Luckily, this has already been addressed and formalised in VMware KB article 52084.
Have a look at KB 52084 – What You Can (and Cannot) Change a vSAN Ready Node.
Edit (21-11-2023): A new KB article has been introduced following the introduction of vSAN ESA and vSAN Max. This article details what can be changed in a vSAN ESA or vSAN Max node.
Have a look at KB 90343 – What You Can (and Cannot) Change in a vSAN ESA and vSAN Max ReadyNode
These are two useful links land one definitely worth bookmarking if you’re architecting a vSAN Solution.