As a developer who spent a couple months developing a microservice using aws lambda functions:

it SUCKS. There's no interactive debugging. Deploy for a minute or 5 depending on the changes, then trigger the lambda, wait another 5 minutes for all the logs to show up. Then proceed with printf/stack trace debugging.

For reasons that I forgot, locally running the lambda code on my dev box was not applicable. Locally deploying the cloud environment neither.

I wasn't around for the era but I imagine it's like working on an ancient mainframe with long compile times and a very slow printer.

Cloud Run is one service where GCP really shines. It is very flexible: handles services and long running background jobs, less annoying run time limitations like you find in Lambda.