You are still mixing production and dev contexts. What is called software development environment is production for your software factory. It’s not development in terms of a sandbox for your deployment, Production environment.

Within your software development environment (which should be treated as prod to maintain velocity), you have blue/green when doing deployments, established SLAs, backups and DR.

This isn’t only for your (deployed) Production environment.

It’s also not software development 101. This has roots in ITIL.