Oh, I'm sorry. I meant that I've deleted these "random" files as the user. As a user I have no faith that application developers will properly manage disk space usage for what they cache. If an application like Chrome has no problem taking up 10 GB of space mostly due to caching, then I have no expectation that most other software will do better. Perhaps this information gets communicated to the user somewhere, but it tends to not be done in an easy to understand manner.
There should be an operating system solution for cache so the storage used can be discounted and the space can just be freed as required, so the operating system can delete caches belonging to deleted apps and that apps have failed to clean up, and so the system can show the user which app is hogging space.
