The context was rather different (home setup), but all that you mention can be used as arguments Noth for and against redo, basing on situation in company, future needs, etc.
I have actually done a "lift and shift" where we moved code that had no support or directly antagonistic one to k8s because various problems reached situation where CEO said "replace the old vendor completely" - we ended up using k8s to wrestle with the amount of code to redeploy.
