Virtual threads are going to be great, but they're still limited (still starved the pool when used with 'synchronized' blocks), and they aren't the structured concurrency power houses like kotlin coroutines, but its an invaluable tool that will only continue to accelerate as the ecosystem moves to adopt them.
Expect a lot of libraries to start release versions that are java 21 baseline because of this feature alone. We're in for a little bit of dependency hell for the short while. Thankfully, devs have been exposed to a mostly final loom for a year, so my hope is that at least the big projects are well on their way to quick adoptions.
Unlike the 8->11 migration which largely brought pain, the 8->21 release brings with it a ton of value that i think will encourage most shops to actually pull the trigger and finally abandon 8.
Expect a lot of libraries to start release versions that are java 21 baseline because of this feature alone. We're in for a little bit of dependency hell for the short while. Thankfully, devs have been exposed to a mostly final loom for a year, so my hope is that at least the big projects are well on their way to quick adoptions.
Unlike the 8->11 migration which largely brought pain, the 8->21 release brings with it a ton of value that i think will encourage most shops to actually pull the trigger and finally abandon 8.