I've been setting up a new laptop and have been pleasantly surprised that while transferring my old config to the new, nearly all the programs I use that have heavy customizations (zsh, tmux, ghostty, git, jj) have all worked without needing adjustments even when installing updated versions. Neovim requires a bit more but it wasn't too bad...
Problem: Every new terminal and tmux pane took ~2.5 seconds to show the prompt. With 100–200 windows/panes opened per day in my terminal-native workflow, that's 4–8 minutes of waiting daily. I'd tolerated it because my .zshrc hadn't been meaningfully touched since 2010 and I wasn't eager to dive into that project.