[sudcha]

Long interview rounds are not only a significant cost for companies, but also for individuals.

Each hour of interview costs a company ~$100, in the time of the interview alone, not to mention scheduling overhead, frustration and recruiter's time spent. 5 rounds for 5 candidates == $2,500 (1 week's salary on average at big tech beginner roles).

For each candidate, that's 5 * (whatever they are getting paid, let's say $50) == $250.

If companies think of it this way, they might as well get some candidates for short amount of time to see a fit, instead of countless rounds spanning months.

Ideally, they should also compensate interviewees for their time, which I doubt will ever happen.