I'm surprised at some of the responses suggesting senior FE engineers are in demand, because I've noticed that most job postings these days seem to be full stack. My current job is full stack, but like some others have said, the focus seems to be on the back end.
I think it doesn't help that a lot of places follow FAANG interview style and go for algo/data structures and system design questions.
I feel like the biggest issue with Web 2.0 is the economic model. Most people probably still don't understand the amount of data collected and sold that funds a lot of social media. I often wonder what the internet would be like if data collection and advertising were gone and people had to pay for services they used.