Leave your nice clean K8s deployment paradise to cruft up for decades, and will it be any better? I doubt it - there'll be old Dockerfiles and weird bits of yaml that shouldn't work but do, and upgrading a version of anything will break random things.
So yes, I think I would prefer the decades of crufty perl and bash to decades of crufty outdated yaml. At least the bash scripts have a hope of doing what they say they do, and are likely to still execute as intended.
Leave your nice clean K8s deployment paradise to cruft up for decades, and will it be any better? I doubt it - there'll be old Dockerfiles and weird bits of yaml that shouldn't work but do, and upgrading a version of anything will break random things.
So yes, I think I would prefer the decades of crufty perl and bash to decades of crufty outdated yaml. At least the bash scripts have a hope of doing what they say they do, and are likely to still execute as intended.