What difficulties can arise from excessive UI markup in Jetpack Compose?

Excessive UI markup in Jetpack Compose can lead to several issues:

• Performance loss: too many composable functions and nested elements increase compilation and rendering time.
• Maintenance difficulty: bulky and tangled markup code is harder to read and modify.
• Redundant recompositions: if state and keys are not optimized, frequent and unnecessary recompositions can occur.
• Navigation and structure problems: excessive nesting complicates state management and navigation.

It is recommended to break the UI into small, reusable components, use remember and derivedStateOf for optimization, and also monitor the number of items in lists and their state.