I love everything I've used from System76, but I'm confused about Cosmic insisting on using hybrid mode for graphics. When developing / profiling GPU code, I'd

I love everything I've used from System76, but I'm confused about Cosmic insisting on using hybrid mode for graphics. When developing / profiling GPU code, I'd prefer the freedom to keep the entire iGPU or dGPU to myself. I'm curious why they're forcing the issue. I'm also curious if this will limit which external graphics ports can be used on some machines to show the desktop.