You do not have to remember the syntax, you can use Vimscript and you can create a custom keybinding that prompts you for the "findtext" and "replacetext" strings, then apply the search-and-replace operation over the next 5 lines (5 does not have to be hard-coded either).

Vim users don't have to choose between precision and ease of use as you can build macros or mappings that match ANY workflow (i.e. powerful, customized workflows that minimize the need to remember exact syntax or to type it all out), for example achieving results similar to multiple cursors but with Vim's inherent efficiency and scalability. So, while Sublime Text's multiple cursors are handy, Vim can match - and even exceed - this functionality with very little setup (one time setup!).