It's all a question of tradeoffs. How hot does it run, how thick and heavy is it, how enjoyable is that in daily use, how long is the burst at which it can offer high performance?
Yes, in heavy-duty work, I'll mostly use it plugged in. It doesn't mean I would particularly something very heavy. The GE76 is 3kg compared to the 16-inch MBP's 2.2. The CPU runs at 135/110W, and the GPU at another 175W. The Apple SoC, in contrast, stays below 100W total (including the RAM). Could Apple do a laptop at 250W that's faster than the M1 Max? Yeah, probably. But whereas that niche is mildly interesting on the Intel side (mainly for games), this isn't a mainstream product.
What does all that buy you? On Geekbench,
honestly not that much. 6% in single-threaded, and 9% in multithreaded, compared to an M1 Max.
But competition is good, and Alder Lake is a big step forward. We'll see how Intel progresses.