Since "Bootstrap" seems to be more searched in the marketplace, I've released a Bootstrap version for those who want. Just proposed to the marketplace.
For now, here is the repo.
Hope this will interest few more people, I'm using it for now 3 months now, and I couldn't create a theme without it anymore. Since my last message, I've created a specific plugin which is compatible with both the TailwindCSS and Bootstrap version when I faced a really annoying "bug":
Webpack use a src folder to store your source files, and then build into a dist folder. This can be modified but whatever you do: the OctoberCMS backend theme editor can't handle any webpack-only configuration.
The plugin act as a liar to October:
You create into the themes directory a your-theme-src folder, then webpack is configured to compile the final theme to your-theme folder, which is the one to activate.
When you activate your-theme from the backend front-end theme settings, the plugin tells to October the current theme files are in the -src folder, so even in watch mode, if you add/configure a component from the backend, webpack catches the modifications, and recompile into your-theme and reload the browser. It is impossible to modify-catch modification-compile-reload without the plugin.
Feel free to report any issue, question or how-to details!