Thanks for sharing this info, Dave. This is consistent with what I had understood as well and is greatly appreciated.
Other than the maintenance free aspect of the wet-rotor, would it “foolish” to go with the old model for any reason? It had served us beautifully for 15 years and we do annual preventative maintenance in any case. If we are going to change it out again - there is a certain peace of mind with going with what we know worked.
Not sure if this is broadly posted or not - if it is, many thanks to everyone else for there valuable input here.