Personally, I think the most important advantage is discoverability. This is related to Will’s first point around making it easier to view past editions, but also I think it would be easier to find via search engines and easier for readers to share individual editions with others.
To clarify, do you mean relative to the current system (i.e. sending emails via Mailchimp), or relative to something else?
Yep vs. mailchimp
Personally, I think the most important advantage is discoverability. This is related to Will’s first point around making it easier to view past editions, but also I think it would be easier to find via search engines and easier for readers to share individual editions with others.