As long as they fix the blasted runtime.
Azure Functions has it's own dll loader, and other complexities that means it doesn't place nice with .net or the larger ecosystem. Currently it does not support .net 3, and I can't even use the most recent version of System.Data.SqlClient.
I like functions it was a good move, but the 'not-quite-.net' keeps getting in the way.
My issue with it is the 10 minute run limit, and the massive memory leak issues if you use durable functions with fan-out. I had to move away from functions and switched to NServiceBus instead.