What probably matters to youSection of the release
What
Yanks and f/t searches now carry from one input to the next, because the shared part of the vim state was lifted out of the per-editor object into session state.
Details
The per-editor vim state lost lastChange; dot-repeat is now tracked on a component ref instead.
What remains, { lastFind, register, registerIsLinewise }, is stored once in session state as vimSharedState.
Evidence
vimSharedState
Strings lifted out of the shipped bundle, so the claim above can be checked against them.