I really like System76, and what they're trying to do. But their mediocre laptop keyboards are always the deal breaker for me--it's the chief human interface, and the one component I don't want to compromise on.
I have a Darter Pro 2019 and I also have two ThinkPads (T490 and W510) and I can say the Darter Pro is not half bad. The layout is "different" but not bad once you get used to it. The feel is pretty good. Not as good as the W510 but comparable to the T490. Even the trackpad on the Darter Pro is smooth.
I agree with the overall sentiment though that it's time for a premium-designer-made-for-linux-laptop!