Is X1Plus available for the P1S? If it is, that’s what you should switch to in LAN only mode. Can slice with anything and feed it over to the printer.
It’s what I did with mine, even though it was in LAN only mode already. Switch over before they disable that option. Already working on selling it though so I can get a Prusa CORE.
Pretty soon the CPU and GPU are going to swap places! Imagine all the cooling you can fit with an ATX sized GPU with a pcie slot for a NUC extreme like compute element on it!