For me I have been waiting for them for 20 years, as the blocking IO made MMO development impossible.
In the meantime we got NIO in 1.4 that only became performant and stable around 1.7 so it's been a slow progress.
I dug out my old blocking server code from back then and with a fresh coat of paint I'm ready to let the non pinned VT's rip and compare them to the NIO backend!