Same here, deployed two functions. One thumbnail converter after s3 uploads which is used a couple of times per day, running for over a year. The other is a log aggregation script that runs thousands of times per hour, running for a few months now. Both run flawlessly, never had to worry about them after deploying.
I'm not using Apex or any of the other frameworks, just plain Go code wrapped by the JS function.
It's really awesome to work with, you just deploy a function and quit worrying about it.
Things like callbacks, message monitoring and stuff like that.
Example:
Monitor SNS messages for auto-scaling and send a message to slack when something fails. https://github.com/KensoDev/sns-lambda-notifier-golang