What's involved in getting a "modern" terminal setup?

Venturing into the world of a modern terminal experience, users grapple with pivotal challenges such as configuring shells for multiline support, managing memory, and crafting useful prompts. Celebrated shell enhancements like oh-my-zsh and theme integration with editors often captivate attention. Meanwhile, fresh and innovative terminal editors like helix offer user-friendly experiences from the get-go. Complexity creeps in when dealing with tools such as tmux and text editors, influencing system functionality and the depth of customization. Navigating this labyrinth can seem like playing computer chess on a typewriter.