Yes, you can define your own commands to do whatever you want. For things like fuzzy search and frecency sorting, there are a handful of plug-ins and frameworks

Yes, you can define your own commands to do whatever you want. For things like fuzzy search and frecency sorting, there are a handful of plug-ins and frameworks that can help, including an FZF interface and a few other Vim/Neovim-specific plugins like Telescope and Denite.