I work at a big tech co. IMO the market has been somewhat poisoned by the disconnect is that in big tech usually has a higher than usual bar to be senior in a specialized role (e.g. frontend) and hiring managers wants full stack engineers to be senior in all of those roles. I've had a lot of conversations with managers from these companies that they'd love a full stack dev but every time they hire one they find the developer can only really cut it in 1 layer.
I'm pretty sure that current valley hiring practices filter out the mischiefs needed to take things from sustaining to innovative. It's why tech is coasting and deteriorating.
I look for passionate adults who respectfully disagree with me. Most firms apparently want eager children who aim to please.