With serverless functions being the hype, along with things like Next.js, Node isn't going away as a popular "backend for frontend" technology.
Is it a good idea to make hype a relevant factor in choosing web or app's architecture?
Yes! Hype = active community and support, interested developers, possibly novel solutions to problems, etc...
If something has hype it's worth investigating, absolutely. But it should also be treated with a great deal of scepticism; there's often a lot of money in it for businesses and individuals moving you onto the latest shiny tech.