I also work at the small mom and pop e-commerce site, and i havent seen it being considered controversial anywhere. And once people see its benefits i think theve been picking it up. Just this week we had a PR that it serioisly reduced the code by 30%
Ya, I really enjoy pattern matching. I think new language features just take a long time to percolate through the community. I remember when `->` was controversial, but that's the only way I write lambdas today. :D
Awesome talk at rails world btw.