There is no doubt that less than 10 years will be needed for China to be able to do something equivalent to what the ASML machines can do now.

What is far less certain is what ASML will be able to do at that time, i.e. if they will be able to progress significantly over the state-of-the-art of today, or they will reach a plateau.

Besides China, there is a renewed effort in Japan to become competitive again, so ASML may face in the future both Chinese and Japanese competitors.