Many people don't realise that while CIs have made huge advances in the last 10years, they are also only suitable for a small percentage of those who are Hoh or deaf (less than 10%) - and even then CIs don't "cure" deafness.
And in addition, the performance of CIs varies hugely. Just as with hearing aids!
ASL is not going out of style. It's just that overall little kids no longer have severe spoken language issues. Like it may be rare for a kid to start out learning ASL, from the get go. HOH kids benifit strongly from ASL. There are still many kids in oral programs who actually NEED the specialized programming offered. I think a lot of those kids will disocver ASL as a second language and then BOOM!