Kagi subscriber here. I think mature technologists should stop supporting proprietary browser technology workarounds, and I personally wont support them although I like the spirit of what Kagi tried to do with Orion on Mac OS.

We dont need ad blockers. We need advertiserproof/trackingproof browsers. Like we have waterproof shoes and coats and hats. We could also use some nicer browsers in terms of features.

But what folks who really care about these details should do is simply de-apple, and de-google (and obviously de-windows!). That will get you much further than using a particular browser, but a good browser helps.