I haven't seen any major conversion issues between 8.1 and 9. This was a big problem with early builds of 8.0.
The parameter transfer mentioned in Karl's post yesterday should make updating placed parts from 81 version to 9 much easier.
Think Like a Spec Writer
MacBook M4Pro - 24Gb RAM
AC4.55 through 29 / AC29.1.0 USA
Rhino 8.30 Mac
MacOS Tahoe 26.4.1
