For sure following hype just for being “hot” can bring problems. However, I’ve been in projects with microservices and nosql being great choices.
React? Functional programming? Sure, they’re not silver bullets, but I think using these can do well both for project and developers. And they’re a nice example of taking a larger view of the programming domain and rethinking some choices.
I also noticed something like “my own choice” syndrome, which leads to dig into the technology chosen by developers by themselves, often spending many off-work hours resolving problems.