I agree. Where I saw it used, I'd say 99% of the application logic was in the web server, 1% in functions. The 1% in functions was for processing large PDF fil

I agree. Where I saw it used, I'd say 99% of the application logic was in the web server, 1% in functions. The 1% in functions was for processing large PDF files where users were sitting their looking at a progress bar waiting for the file to be processed in real time. Another use case might be for something that is very low load, and say you have a lot of these services you may not want a VM for each one. However Docker provides a nicer solution for that: Get a VM (reserve if required) and run some kind of Docker host/orchestration on it, and run all your little services from there.