Wipr 2 is a complete rewrite and was released in Nov 2024. So, in theory, for £1.99 you could've gotten 9 years of ad-blocking on iOS and for another £1.99 the same on macOS for 6 years.
And since this requires maintenance of the blocklists and associated code, I am totally fine with paying a small amount once every few years. And I'm not even forced to pay as the older versions usually continue to run - albeit on life support.
That said, I'm not actually convinced there will be a Wipr 3, at least not without some significant change to the ecosystem first. Wipr 2 was a complete rewrite of Wipr, there's no reason to expect it will need yet another complete rewrite.
I don’t remember what those advantages were, except that I was persuaded thst they seemed like good ideas.
Sorry. I know that couldn’t be more vague if I tried.