Consider deprecating old data API

**Problem**
When working with components, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

The issue names no files, tests, or entry points. Start by reconciling the title's proposed data API deprecation with the body’s request for component error handling, then locate the relevant API and component paths; done should include an agreed scope and detailed error-message behavior.

Written by the indexing model from the issue text.