[cloakandswagger]

Lambda does provide a level of convenience via abstraction that EC2 doesn't: just provide inline code, an S3 hosted zip file or, recently, an ECR image and it's off and running.

I doubt this is a difference marker for most medium to large sized customers though. Making a wrapper for invoking uploaded code is trivial and if done on EC2 doesn't come with the baggage of Lambda (cold starts, costlier expense, more challenging logging and debugging, lack of operational visibility, etc)