As @baris has replied in that issue, this is already a feature in the ACP. It sounds like you are looking to disable the "welcome" email, but preserve the existing email confirmation emails, yes? In that case, you'll have to wait until v2.2.0, at which point you can use a plugin to change the template for the welcome email back to verify-email.

@syedasad not out of the box, no. It sounds like you'd need a custom plugin to modify the topic visibility privileges on the fly based on whether the topic is the most recent X topics. Feel free to reach out to us for a quote on this kind of custom work [email protected]