Using NextJS, I see 2 kinds of errors:

Server Error

• generated it using throw new Error(...) inside getInitialProps...
• it can occur due to some business logic or unexpected API response;
• screenshot:

Unhandled Runtime Error

• generated it using throw new Error(...) inside a component
• it can occur due to some business logic;
• the error here is captured by the ErrorBoundary (which is set inside _app.js)
• screenshot:

Question: unhandled run time errors are captured inside Error Boundary (as they do in ReactJS)... how to best handle the 'server errors'... what is the best practice?