The critical errors should probably return an exit code of 1 so that the tools like Azure DevOps pipelines could interpret the error conditions automatically. The kiota step was "successful" in the run below and the pipeline continued running, even though there was a critical error in that step.

https://microsoftgraph.visualstudio.com/Graph%20Developer%20Experiences/_build/results?buildId=76215&view=logs&j=c52f3745-d4e6-5486-f10a-a43ce9aa535b&t=13fd0947-9645-5959-dbba-e2cbb85ab89d&l=14

crit: Kiota.Builder.KiotaBuilder[0]
      Could not open the file at /home/vsts/work/1/s/msgraph-metadata/clean_v10_openapi/openapi.yaml, reason: Could not find a part of the path '/home/vsts/work/1/s/msgraph-metadata/clean_v10_openapi/openapi.yaml'.

cc: @ramsessanchez