Based on that page, they're dropping the REPL in favor of notebooks, but their're not dropping scripts. They are dropping some script-related functionality to focus on others.
Yes, they are not dropping scripts completely, at least because of Gradle, but they are removing some parts of scripting support and advise against using Kotlin for scripting. And I would prefer a true command line REPL instead of the notebooks. IIRC they were promising various improvements in both scripting and REPL for several years, and now they just gave up, I guess because of shifting the focus to K2 and KMP. I find this quite disappointing.
Also worth noting that notebooks and kts overlap quite a bit. They use the same mechanism for imports and defining remote repositories, for example. A notebook is effectively a kts script. And of course gradle uses kts as well for its Kotlin dialect. These things actually overlap quite a bit.
