There are many people in China who still use browsers with low-version kernels, such as Xiaomi, 360 Browser, etc, which cannot use the latest Chromium kernel in the first place. Tailwind v4 basically only supports Chromium 111 and later versions, which results in some advanced features of Tailwindcss v4 not being displayed on these browsers. Downgrading Tailwindcss to v3 is obviously better...
It took me nearly an entire night to downgrade Tailwind (although not much change was required)