I'd like to give a massive shout out to @shirkevich for working closely with us to implement parallel/concurrent execution in Atmos. In the upcoming release, you can control concurrency of

--all

and

--affected

for

plan

and

apply

operations. e.g.

atmos terraform plan --all -s prod --max-concurrency=4

https://atmos.tools/changelog/terraform-dag-concurrency