[crispinb]

It depends very much on where you are in your career. If you're at the stage where you feel confident that you can maintain a living, then of course it's 'worth the trouble'. I don't know Rust, and don't imagine it's something I'll ever use professionally, but it's definitely on my (too long, and increasing rather than diminishing) list of things to learn.

If you're not yet 'secure' (no-one ever really is, but you know what I mean), then, you'd probably be better off learning something more immediately bankable, and coming back to Rust later.

Though there's no rule. An early-stage developer might have a passion/aptitude for Rust, and the resources to work hard learning it, contributing to open-source, pitching themselves at companies they've researched and like the look of, etc.