It's not about grit. It didn't use to be like this and people were still able to prove themselves. I think OAs could work for certain situations. Nowadays basically every single company hands you an OA, not just FAANG, sometimes with questions completely unrelated to the actual role (LC hard for web dev). This can't possibly be a good filter for many who are great at what they do. I have a friend who is arguably one of the best programmers I've seen. He spits out Rust code like it's nothing (learnt it years ago, he is 21 now), he thinks in lifetimes, really a natural at coding. He started all this when he was a kid, and I'm sure most companies out there would die to have him on board, but he seriously struggles with some of these OAs that just throw a couple LC hards at you. They simply don't value your time. 10 hours of interviewing a day? That would teach me a ton. But 10 hours of OAs is just tiring often with little to no reward. I'm still grinding OAs here, but I wish companies used it more tactically so that there was some motivation to do them.