[buu700]

Same here on a 2015 MBP, no external monitors. Constantly kernel panics during sleep, occasionally while I'm actively using it.

Meanwhile, my 2013 MBP running Mojave and connected to an external monitor and peripherals has been chugging along with no issues pretty much 24/7.

[chrisfinazzo]

Same here on my late 2013 15". Other than a few weird moments back in the 10.9 days when I tried installing Xcode on an external drive, it's run like a champ, upgrades and all. I was nervous about putting Mojave on it, but it's run surprisingly well, albeit a bit slow, although that's expected at this stage of the game.

The same can't be said for the machine it replaced, which began life on 10.5 but was brought to its knees by the combination of an 8600M GT and the 10.7 upgrade.

Right now, I'm waiting until things settle down - because COVID 19 - before pulling the trigger on a 13" Pro.

Discrete GPUs in portables are for masochists.