node-postgres template: two competing ways to share context

[ivan-kleshnin]

I'm exploring this template: https://github.com/remix-run/react-router-templates/tree/main/node-postgres

db object is shared via NodeJS' AsyncLocalStorage feature:

// -- In a different file --
// export const DatabaseContext = new AsyncLocalStorage<
//   PostgresJsDatabase<typeof schema>
// >()
//
let db = drizzle(client, {schema})
app.use((_, __, next) => DatabaseContext.run(db, next))

Demo VALUE_FROM_EXPRESS is shared via @react-router/express getLoadContext feature

app.use(
  createRequestHandler({
    build: () => import("virtual:react-router/server-build"),
    getLoadContext() {
      return {
        VALUE_FROM_EXPRESS: "Hello from Express",
      }
    },
  }),
)

I tried this:

app.use(
  createRequestHandler({
    ...
    getLoadContext() {
      return {
+       db,
        VALUE_FROM_EXPRESS: "Hello from Express",
      }
    },
  }),
)

and it works, db is accesible in loader. So why do we need more verbose AsyncLocalStorage after all?