Why should I use this over <a href="https://gocloud.dev/howto/pubsub/" rel="nofollow">https://gocloud.dev/howto/pubsub/</a>?<p><a href="https://godoc.org/gocloud.dev/pubsub" rel="nofollow">https://godoc.org/gocloud.dev/pubsub</a><p>This has support for many pub/sub protocols.<p>Why reinvent something that already exists instead of just contributing back to an existing project?