If I set my DNS zone's SOA serial number to "1" and never change it, would domain name servers around the internet ignore or be slow in seeing zone updates?
Since all my primary DNS servers for my domain are masters, I don't have a case where slaves transfer zone data when the serial changes. Each of my DNS maintain identical master zone files.
Say I have an "A" record. I assume each time the TTL expires, resolvers re-query the domain's masters for a new "A" record and will return the IP in the master zone at each time of query. So does the SOA serial matter?
Some additional context. I see that AWS Route53 defaults new DNS zones to serial "1" and says that incrementing the serial is "optional" but does not say why it's optional https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/SOA-NSrecords.html