The major update is Apple truely remove the itunes that's has been available since 2001, which change with a new trigram approach; Music, Podcast and TV.
And most important notice, no mire 32bit apps on MacOS Catalina. Means it should become more stable in handling multiple Apps that is running on the same architecture, 64bit.
By the way, no need to improve on the UI, coz it is already great. Do not make the great things look bad.
