Below is an overview that could serve as the basis for a paper on this topic. Legacy Support & Platform "Exclusivity"

However, none of these offer or the granular registry backup that the XP Exclusive Revo does.

Windows XP’s built-in "Add or Remove Programs" utility is notoriously basic—it often leaves behind registry keys and junk files that bloat the system. Revo Uninstaller provides a multi-step cleanup that is far more thorough: Deep Scanning:

Disables startup programs to speed up XP's boot time. ⚠️ Compatibility and Versions