You have to explicitly propagate the group's context if you want it to cancel. You can just not do that if you don't want - there certainly are cases for that.

It does not, which is easy to verify from the source. Every func passed in is always run (with the exception of TryGo which is explicitly "maybe").

At best, using the optional, higher-effort errgroup.WithContext will cancel the context but still run all of your funcs. If you don't want that for one of the funcs, or some component of them, just don't use the context.

If the context cancellation is undesirable, you just choose not to use WithContext, as the sibling comment mentions.

You could also just make your subtask function return nil always, if you just want to get the automatic bookkeeping call pattern (like WaitGroup.Go from Golang 1.25), plus optional concurrency limiting.

Also note, even if a subtask function returns an error, the errgroup Wait blocking semantics are identical to those of a WaitGroup. Wait will return the first error when it returns, but it doesn't unblock early on first error.

something like this would do it:

  package main
  
  import (
    "sync"
    "time"
  )
  
  type WaitGroup struct {
    sync.WaitGroup
  }
  
  func (wg *WaitGroup) Go(fn func()) {
    wg.Add(1)
    go func() {
      defer wg.Done()
      fn()
    }()
  }
  
  func main() {
    var wg WaitGroup
    wg.Go(func() { time.Sleep(1 * time.Second) })
    wg.Wait()
  }

buffered channels won't help here. That's just how many results can be buffered before the remaining results can be added to the channel. It doesn't wait until all of them are done before returning a result to the consumer.

Your math equation turned the asterisks into italics.

hold on, why would you have 7 hours?

dont you mean a week? 60 x 60 x 24 x 7 ?

or at lest 8 hours?

7 hours is just odd

That is a much better argument than saying it is "more clean", which doesn't mean anything. I don't necessarily agree, because I don't think zero values are a good feature of the language, and even if they were this is a completely trivial case. But at least I don't have to work out what "cleanliness" is.