Re-engagement is the soft sibling of winback. The user hasn't churned, just gone quiet. The templates here lead with curiosity (asking for their brain), specificity (tying back to a previous feature request), or seasonal cause (spring, year-end). All avoid the 'we miss you' framing.
Send these to users who have used the product enough to have an opinion. Generic re-engagement to inactive sign-ups underperforms across every metric.