Construct now supports using the WebP image format when exporting your projects. It can reduce the file size of images by 20-30% with few downsides, helping ens...
The build-in Memory management is not useful in this case as all the Actions require that you have the images in a (Layout or inside the Project) which will bring me back to the big issue that C3 has which is that it preloads all the images in the project when it first runs the game so when you have thousands of frames images, C3 takes very long to load the game and this is especially killer on mobiles so that's why we have to balance it up with load from URL etc..... I explained this issue to you before on other threads.
Also, don't just look at the Memory issue as very often I saw on the forum threads asking how to convert this image to base64 to send it to Server, etc... so I think is a very common thing used not just for memory management.