It's just a rebuilt drop-in replacement stylesheet compatible to the built version of tachhyons 4.12 but using css variables (so when you need to write custom css you can use its tokens) and it has support for grid plus a few more modern utilities.
Building an application you use this as your utility layer that gets you 80% and for the rest you use an application specific custom css to write the parts where css is the best.
Building an application you use this as your utility layer that gets you 80% and for the rest you use an application specific custom css to write the parts where css is the best.