Recently, while browsing questions and answers, I came across some excellent posts by users I had previously interacted with. Some of these users I remembered well because they were helpful, while others I had communicated with multiple times. However, as I checked their profiles, I noticed many had not used SE for a long time (some for up to 9 years), and others had deleted their accounts. Although I have never met these users in real life, I still feel they contributed valuable perspectives to the community. It was both sad and nostalgic to see them no longer active on SE.
This inspired me to suggest a new feature. It would send periodic emails (perhaps monthly) to users with deleted or inactive accounts, inviting them to return. Users could opt out if they prefer not to receive these messages. I was inspired by Duolingo, which has a similar feature, sending reminder emails to re-engage inactive users. I believe implementing this could help bring back experienced or helpful members, enriching the community's diversity and enhancing the overall quality of Q&A on the site.