Currently, we have 5 users who are eligible for this kind of badge, and it wouldn't make sense not to reward their longstanding dedication with an upgrade to their current BN/NAT badge:
Since it would be a potential hassle to make a 6y/7y badge due to design limitations, having a +5y badge would be much more convenient, easier to make, and future-proof.
Currently, we have 5 users who are eligible for this kind of badge, and it wouldn't make sense not to reward their longstanding dedication with an upgrade to their current BN/NAT badge:
Deif: 7y NAT jonathanlfj, Gero: 7y BN Mao: 6y NAT neonat: 6y BN (dates have been checked using https://bn.mappersguild.com/users )
Since it would be a potential hassle to make a 6y/7y badge due to design limitations, having a +5y badge would be much more convenient, easier to make, and future-proof.