Discovering the Sage WordPress starter theme was revolutionary to my workflow. Not only does Sage improve the basic architecture of WordPress themes, but they also offer a convenient, modern front-end development environment, with Webpack and Browsersync pre-configured, along with Bootstrap CSS and js integrations.
As I work on more and more Ghost projects, I realized just how much time I could save by building a Ghost starter theme similar to Sage. Frontier builds on the excellent Undefined Ghost theme by Curiositry, adding Bootstrap 4 and a simple Webpack / Browsersync pipeline for live refresh, asset versioning, CSS/js processing, and lots more. This environment saves me a ton of time, and I hope it saves you time, too.