There is a huge pool of exceptional junior engineers

When I hire juniors, I try to give them problems that I know they likely won't be able to solve in the interview because I want to see how they think about things. The problem has become that a lot of kids coming out of college have done little more than memorize Leetcode problems and outsourced classwork to AI. I've also seen less and less passion for the career as the years go by (ie. less computer nerds).

Unless the company is doing something that requires almost no special domain knowledge, it's almost inevitable that it's going to take a good while for them to on-board. For us, it usually takes about year to get them to the point that they can contribute without some form of handholding. However, that also mostly holds true for seniors coming to us from other industries.

Interesting - I see the appeal of this approach. Equally, I do the opposite - I give easy problems which can be solved quickly. I find people either can do them pretty quickly, or not at all.

I used to ask harder problems, like you, but found two failure modes: either smart people who panic and can't think straight in an interview, or people who can do high level thinking but then can't swap two variables in actual code.

That said, thinking back on my recent hires, I'm not sure this method has yielded any improvements.

What a refreshing level of honesty! Admitting that perhaps your new method also doesn't work. Thanks for sharing that! It's often lacking from online discourse.

(I also prefer easy-to-solve challenges. And usually bring up more complex topics during problem solving to assess candidates)