[miunau]

Parameter store should be straightforward, I wasn't actually even aware of it existing.. And yes, the more the merrier! Just make up some non-interfering URI scheme (I would probably use awspm://) that won't be reasonably used as an environment variable as is.

[jaktet]

As for as a general reason to use it over SSM is that it’s free for like under 10k values but it’s not secure by default since it also allows non-encrypted values to be stored. AFAIK you can use basic encrypted values with it the same as SSM, but for more advanced uses there are differences.

Fun fact: SSM is also an acronym for parameter store, it used to be known as EC2 Simple Systems Manager: https://d0.awsstatic.com/whitepapers/whitepaper-ec2-ssm.pdf