Some thoughts:
1) Some companies have had the same job ads open for well over a year. Did they forget to close the role? Do they even have a People team reviewing applications? My guess is they're not actually hiring, and that the roles are listed to make it seem like the company is healthy and growing.
2) Every now and then I'll receive almost an instant decline from the ATS—my guess is that the application didn't pass a filter, or they're not able to hire in a specific state, so it's an automatic no. I try to hone in on the "this role is available in these states" sentence before I bother with an application. Often times it's not listed.
3) Recruiters who I chatted with three months ago, who were new to the company at the time, have now moved on to another company. These conversations are always difficult, because it's clear the recruiter doesn't know anything about the work to be done, or the company, nor do they posses the language to ask good and relevant questions. And now, these people aren't even at the company. Had the hiring manager or team lead handled the first interview, things might have gone differently. We miss out on a lot of great roles and opportunities due to recruiting stupidity.
4) I'm "getting older" and I'm finding it difficult to chat with some of the younger folks in the interview process. They've all bought in to the same VC rule book for hiring and team building and it just doesn't resonate with me at this point in my career. And, I've seen a lot of weird camera setups that make it challenging to have a conversation. I had a video call recently where the recruiters camera was pointing at the side of the his face—full on side view—and he was looking at my video on his screen positioned directly in front of him for the whole meeting. He never once looked at or in the direction of his camera. Bizarre.
5) I was using my HEY.com email address for applications, wasn't getting any traction, switched back to my Gmail address and got a few first-replies almost right away. My sense is that HEY is still seen as a "novelty" address, or similar to seeing a Yahoo or AOL address on an application—you make a quick judgement about someone based on their email address.
6) I had been linking off to my website that has an expanded profile and work history, but almost no one clicked through to read. It has had minimal visits, only one person has referenced the site during an interview, so I've stopped including it on applications. And in general, I think it's possible to "share too much" ahead of a first interview. The website might do more harm than good.
7) I've got a lot of work experience, so my résumé has always been a neat two pages. I switched back to a one-pager and seem to get more hits with the one page format.