A shared file system for  lambda functions
I'm curious what people actually use Lambda for?<p>I tried Lambda for a use-case that I had in 2018:<p>We published Polls and Predictions to people watching the 2018 World Cup.  We set the vote callback URL to a function on AWS Lambda.<p>It failed spectacularly during our load-testing because the ramp-up period was far too slow.  We needed to go from 0 to 100,000 incoming requests/second in about 20 seconds.<p>We had to switch to an Nginx/Lua/Redis endpoint because Lambda was just completely unusable.  It would have cost us $27,000/month to pre-provision 10,000 concurrent executions...<p>What is it that people actually use Lambda for?