@pianoloverus your passion for PW is clear and praiseworthy 🙂 That said, I don't actually agree that splitting off one community from another is necessarily a bad thing. I'm not just talking about two piano sites, but anything in life. As long as mankind has existed, groups have existed. Countries have split off from each other. So have companies. So have families. And so have Internet sites.
There could be many reasons, sometimes for practical reasons, sometimes because of differences of opinion, sometimes because there is no other choice. I think PT could arguably fit into all of those reasons. Practical, because the software was (is?) so outdated on PW. Difference of opinion, because some people didn't agree with the direction PW had gone into, whether excessive ads, or aggressive moderation. No other choice, because some people were banned from PW and found refuge in another forum. Some like yourself remain active on both, but others made a clear choice which forum to make their home.
Speaking strictly for myself, I only had one year of active membership of PW, the rest here. Personally I moved across because I'm sorry to say that some of the attitudes in that forum kept rubbing me wrong. I'm not saying those people were wrong, I'm saying that I personally did not appreciate some of the things that were said, which might be on me. But one can't change one's character. Perhaps you might not consider that valid criticism, but that is my perception and I stand by it. If PT hadn't come into existence, I doubt very much that I'd still be active in any forum. Heck I might not even be playing piano any longer, because it wouldn't be the first time that I gave up on that.
So personally I am grateful that PT exists, because it gives me a place to discuss a hobby I enjoy with fellow enthusiasts. If others find PW such a place, or if they are happy to hop between two places, then that is entirely their choice. I have seen people on PW mocking PT, saying this forum has nothing but a bunch of beginners mouthing off about piano without any actual knowledge. And here people might feel the need to blow off some steam about PW on occasion. I don't think there is a need to get into vigilante mode either way. But, again, that is my personal opinion 🙂