I had read that on Marlin before, but I find it's not exactly clear on the points probed; nor does it seem clear to me. All I know is to use bilinear (which is what I've un-commented).
So far with all the features I want enabled, I'm only at 86% or so. The two features that are a game changer are SDCARD READ ONLY, and SD SUPPORT.
Again, it's not very clear on what these both do. SD SUPPORT allows for power recovery loss. Disabling this saves lots of space, but it states disable this if you don't need to print from the SD Card. SD CARD READ ONLY states to enable this for SD card printing.
So SD SUPPORT implies you can't print from the SD card unless this is enabled, but then SD CARE READ ONLY implies to enable it for SD printing.
https://crosslink.io/marlin-2-0-memory-usage-by-feature/My only other question that I had asked is can bilinear leveling be enabled in the gcode in order to save memory? This way the gcode would tell the printer to perform bilinear and this would free up more memory in the firmware.