The new rendering engine separates the preview process from the main IDE process. That means if your preview crashes (which still happens occasionally), You just get a "Retry" button. Thank goodness.
Google finally optimized the Resource Manager and the Layout Inspector. In previous versions (looking at you, Hedgehog), clicking on a large XML layout file meant a 5-second lag spike. In Koala, it’s instant.
Here is the honest, no-fluff breakdown of what you are actually downloading. Let’s start with the obvious. The first thing you notice after you download Android Studio Koala isn't a UI change—it's the speed .
Plus, you can now preview multiple states of a composable simultaneously without writing boilerplate @Preview annotations. It’s a massive quality-of-life boost. Most people searching for "Android Studio Koala download" are looking for the new Device Streaming feature.