[MarkyC4]

> this does not seem to present itself in all current 15/16” chassis models

I think they're referring to the thermal throttling, and not the MBP forcing the discrete card when an external monitor is connected. As far as I know, there is no way around using the discrete card for external monitors (on my 2015MBP at least, I'm pretty sure the HDMI port is wired direct to the M370X).

I've solved the thermal issues by using an eGPU (like GP suggests)

[Hamuko]

I have a 2019 16-inch MacBook Pro connected to two displays via USB-C and DisplayPort through a Thunderbolt dock and it seems like it also forces it to discrete graphics. I'm not sure if I've ever seen it use integrated graphics when I'm docked.