Effect.Service parameters: when to use effect/scoped factories vs ServiceMap

import type { Layer } from "effect"
import { Effect } from "effect"

class NumberService extends Effect.Service<NumberService>()(
  "NumberService",
  {
    // You can now pass a function to the `effect` and `scoped` constructors
    effect: Effect.fn(function* (input: number) {
      return {
        get: Effect.succeed(`The number is: ${input}`)
      } as const
    })
  }
) {}