This is a brilliantly simple solution to a problem a lot of us face, but unfortunately, I think you're going to have a lot of difficulty in getting users – simply because most corporate information security guidelines disallow forwarding emails to non-essential third parties.
Thanks for the feedback! I hear you that it could be a challenge.
I often need to refer to email threads in Slack, GitHub, documents, etc. I built mailtolink to make that process as simple as forwarding an email and dropping in the resulting shareable link. I'd love to get feedback on it!