Go learn Rust (no pun intended). You can still do web stuff with it, but it will open new paradigms for you. With the stricter rules it enforces on you, your craft will level up. Not sure where to go from there though :)
To leave frontend behind, you can maybe check out database focused projects, try devops, learn graphics or the ultimate answer: try management as a team lead or product owner, I'm sure in 13 years you've seen web project from all angles.
If you have enough money left, try to relax, read some IT classic books and don't think about work for a while, you will know what to do most likely.
To leave frontend behind, you can maybe check out database focused projects, try devops, learn graphics or the ultimate answer: try management as a team lead or product owner, I'm sure in 13 years you've seen web project from all angles.
If you have enough money left, try to relax, read some IT classic books and don't think about work for a while, you will know what to do most likely.