(On the bootstap 4)
xxx is. He just came out, right?
YYY: This is the web. You have to study it before it becomes obsolete.
xxx: yyy, if I have time to learn it before midnight, what is the probability that it will not get obsolete afterwards?
XXX is no chance.
zzz: Cinderella, remember - exactly at midnight the car will turn into a pumpkin, and the framework will be updated without reverse compatibility!