I think that the "Maximum Undo Step by VI"
default value (Tools>Options>Environment) should be changed form 8 to the maximum of 99. For every new
LabVIEW version I install, I end up changing this (from 8 to 99).
I'm like altenbach and seldom run in the current undo limit of 8. And this is presumably because I started with LabVIEW 2.2 where something "useless" as undo simply didn't exist.