My friend tried to run 3 external monitors on his 2019 Intel 8-core 16" 32gb MacBook pro and it gets to melting temperature, throttles, and just sits there with a spinning beachball disc for most of the day. Lid closed, vertical cooling stand! Seriously.

My wife has a 16" MacBook pro 2019 with a pathetic 16GB of ram. When she connects a 4k 30hz Sony x800h tv to her MacBook (via HDMI dongle) it heats up terrifically and throttles down to about 1/10th speed and the mouse jumps across the screen and button pushes can take minutes. Her solution? Avoid external monitors! Seriously.

I am able to use my 8-core 32gb 2019 MacBook pro with a 4k tcl s405 4ktv & HDMI dongle but it takes about 5 minutes each day to get it to sync to the dongle that never gave me problems with a 2018 MacBook pro. I had to change my calendar reminders to add minutes to the alarm first thing in the morning it's SO FLAKEY! Seriously.

So two out of three of us are enjoying external HDMI monitors with our MacBook pro 2019. But we aren't enjoying them very much!