While I enjoy learning stuff that's out of my expertise, I do worry about whether or not being a generalist is more of a hindrance as both the backend and front

While I enjoy learning stuff that's out of my expertise, I do worry about whether or not being a generalist is more of a hindrance as both the backend and frontend have a LOT of ways one could expand their mastery. There is a bit of zero-sum in this as the hours I spent outside of work learning Go/Rust/Postgres for more understanding of the backend could've been spent on diving deeper into frontend things like performance optimization and web accessibility.