Difficult question to answer because it's difficult to know what you're asking. What is "it" here? Next.js? OpenTelemetry? This specific implementation? PHP is

Difficult question to answer because it's difficult to know what you're asking. What is "it" here? Next.js? OpenTelemetry? This specific implementation? PHP is a programming language, Rails is a framework. They're quite different propositions. What you're seeing here is equivalent to poking around in the guts of Rails, which assuredly has plenty of complexity hidden inside it. I personally have a negative reaction to this amount of stuff in a project but I feel similarly about Rails. Next’s big “thing” is one codebase that runs both on the server and client. That introduces complexity where you might not expect it. But a Rails app and a totally disconnected JS front end will also introduce complexity, just a kind you’re more familiar with.