Recruiters are extremely hard to find. Comp has soared. Many have left old jobs to go to new jobs.
Generally, people rely on recruiters to manage the communication with candidates. Very high turnover leads to very high rate of things being dropped.
Compounding this, hiring great engineers is extremely difficult right now. So recruiters have a list of 10,000 things to do. It’s not ok that recruiters might be less effective in candidate management for no-hires, but it makes sense.
Finally, add on top of this that candidates are being less respectful of company time as well. Candidates are ghosting and not responding like never before. The market and the remoteness of the experience are turning hiring from a human activity into a transaction, on all sides.