Everything is one of the clearest examples of a Windows utility that solves a daily pain point so well it becomes hard to go back. The tool is designed around extremely fast file and folder name search, which makes it instantly relevant to anyone who wastes time hunting through directories.
It fits developers, operators, office users, researchers, and power users with large file sets or many nested folders. If the phrase I know the file exists, I just cannot find it sounds familiar, Everything is exactly the kind of tool worth installing.
What makes Everything worth keeping is speed. The search experience feels immediate enough that file lookup stops being a chore and becomes something you can trust in the middle of work.
The tradeoff is that Everything is mainly about name-based discovery and fast indexing, not about being a universal content-search engine for every kind of document content. Users should understand that role clearly.
My recommendation is to use Everything if file retrieval speed matters to you on Windows. It is especially good for users whose productivity keeps getting interrupted by slow or inconsistent Explorer search.