For Ctrl+R, suppose you ran 'curl' against a bunch of API endpoints on a single domain name 2 months ago. I can now easily find one without knowing too much detail by fuzzy searching curl+part_of_domain_name+part_of_path.
For Alt+C, yes files and directories are often a huge mess. It may be no fault of your own. Maybe you're working with a giant legacy codebase or digging into node_modules. Now you can type 'vim Alt+C', to find and immediately open whatever you're looking for.
Of course this can all be done other ways, but it's very convenient and very fast when paired with ripgrep especially.
For Alt+C, yes files and directories are often a huge mess. It may be no fault of your own. Maybe you're working with a giant legacy codebase or digging into node_modules. Now you can type 'vim Alt+C', to find and immediately open whatever you're looking for.
Of course this can all be done other ways, but it's very convenient and very fast when paired with ripgrep especially.