I’m very lucky........I have gotten a chance to use and enjoy them all.
ZW as a kid with my PostWar Super O layout.
A second ZW with two Zs for my attic layout from 93-03.
Z4000 and. ZWL for my modern layout.
KW and an MRC for our modular layout along with a Z4000 for the larger one.
Over the years I have used an American Flyer transformer to back up my PostWar layout. A Jefferson transformer for PostWar accessories.
At various times a 1033, a TW or an SW on my workbench.
Love them all in the situations I have used them.
Peter