Comments of chapter undefined of A Great Sage gave me a System

Quite interesting so far, I like the fact that the System is explained instantly, and that we're actually given the perspective of the old man to begin with. Can't wait to see Zhang Baichi's journey. Apart from that just a few questions. I don't mind young masters, but is every villain going to be a young master, or are there gonna be some proper antagonists. Haremwise, I just want to know if he's going to be collecting them like pokemon or not. I don't mind harem or no harem personally, but if it gets excessive like 10+ in 300 chapters, not really my thing. Besides that this is more of a question out of curiosity, since the system was given by the old man, will it become obsolete in future, or be upgraded over time? If the answer is a spoiler then I am fine not knowing the answer. Thanks for the chapter.