I use projectile and perspective. Everything is integrated into my Ivy/Counsel and I have simple self documenting shortcuts for everything using General keybin

I use projectile and perspective. Everything is integrated into my Ivy/Counsel and I have simple self documenting shortcuts for everything using General keybindings. Until I set this up correctly the leftover buffers bothered me. Now it's part of my workflow. I often have code from two projects side-by-side in split windows. Projectile restricts all of my actions to the appropriate project Autocomplete, code navigation, file search, fuzzy greps, everything uses the buffer's project as context. With just two key presses I can close all buffers for any open project.