"first principles" and "from scratch" are predictable failure modes... he had very good reason to pursue a Python-like language given the circumstances and objectives

I think I get what you mean and I should have been more precise in my wording. I didn't mean that an alien language that looks nothing like we have ever seen but for the sake of doing it "right" from scratch would have been a good idea. A new programming language definitely should steal the ideas of other languages that turned out to be good. But Mojo also adopted some of the arguably bad ideas from Python just because there was too much design pressure to appeal to Python programmers. I wonder what Mojo could have looked like without this particular pressure. Basically, with what kind of programming language would a person with as much experience and good taste as Chris Lattner come up with if there were no such external pressures?

> But Mojo also adopted some of the arguably bad ideas from Python

Like what?