I think various ‘longer interview’ processes can be good by reducing the chance of particularly regretted hires. This could be internships (but note this goes two ways and you want interns to accept offers and recommend the programme to their friends even if they are not hired) or work sample tests. Both have the downside that they are more work for the candidate (especially internships or some other short-term-to-possibly-long-term position) and so experienced candidates who feel they have better options and less need to prove themselves typically won’t take part (this depends a bit on how much they want to work at your specific company of course). Potentially this isn’t so bad – competing to hire the same people as everyone else is going to be more expensive – or potentially it is bad – maybe there’s a reason those candidates are in high demand and you will suffer from only getting a look at people who didn’t fit the typical pattern. I think it’s going to depend a bunch on how good you are at sourcing candidates and how hot your firm is.