🚫** (Warns in development) is open to interpretation

My colleagues and I were discussing this section of the docs and got a bit confused:

https://reactjs.org/docs/concurrent-mode-adoption.html#feature-comparison

It was not 100% clear whether 🚫** → Warns in development means

• works, may be buggy, warns in development
  or
• does not work, also warns in development.

Both interpretations can be explained logically. The first one can be true because the footer note does explicitly say does not work and we're still in 16.x, which assumes no breaking changs. The second interpretation comes from the presence of 🚫.

I'm wondering if the docs could be improved by replacing 🚫* and 🚫** with distinct emojis (e.g. ⚠️, ⛔️, 🚨, 🤞, ✳️, 🆗, ❇️, etc.). Each emoji can be present in a footnote, including ✅ and 🚫.

從連結的 concurrent-mode-adoption.html URL 中的 Feature Comparison 區段開始，檢查 🚫* 和 🚫** 的圖例、註腳與螢幕截圖。釐清支援但會顯示警告的行為與不支援的行為之間的區別，然後確認修訂後的符號與說明在文件中是否清楚呈現。