And I'm actually ordering MORE plates than I ordered PCBs. I think what may be holding some people back is boost's alu case design with integrated plate.
I'll just say this, there is no real reason NOT to buy one of these plates for every PCB you ordered, unless you only ordered extra PCB in case you screw one up. They are cheap as hell, especially for a stainless steel plate. And even if you want to wait a few months for boost's alu case, what are you losing by buying one of these? $22?
Phantom was designed to be highly customizable in regard to layout options. If you want to change layouts later, you could desolder the switches and do that, if you had another plate.