Well, Google App Engine (both the standard/classic and flexible kinds) has been and still is pretty awesome for people who don't want to worry too much about SRE stuff but still not pay through the nose.

AWS Lambda just seemed like too much bureaucratic busywork for no good reason (ugh API Gateway...), last time I tried it out.

I guess it maybe appeals to "enterprise" type developers? Maybe it this way cause Werner Vogels is german and from an academic background? :-) I'm adventurous, because I write this knowing that even referring to national characteristics results in instant down votes here.

Just give me an endpoint where I can respond to HTTP requests and parse the URL path/parameters myself, thank you. That way I can keep it as simple or as complex as is needed, per situation. I just don't want to bother with your insanely over-engineered API of definining custom API requests.