I didn't jump onto the Orion train until 1.0, and like what I've seen thus far.
On desktop, it's not to the point where it would dislodge my current finely-honed Firefox setup, but on iOS, I like it enough to try making it my default…which was iCab, the one browser that has come closest to replicating the desktop experience on mobile I've come across, is still being actively developed, or hasn't been sold to a different developer and ruined. Very flexible, and offers a lot of utilities that make managing much easier. I've had multiple interactions with the developer, and he's been responsive. But, I've been hesitant to update to the newer rewritten version, given all the poor reviews it has received, and stuck with the older version.
I'm firmly in the camp that likes customization, or at least to a much higher degree than most stock browsers like Safari offer, so it has never been my go to.
Like Mozilla (though now to a lesser degree), I also like what Kagi's goals are for the project, and what they're trying to achieve.
But the reality is that building a browser is hard work, for little reward, and a limited audience. Most users are happy with stock browsers and live in a sort of ignorant bliss with whatever default their OS or platform offers.
That also makes browsers difficult business cases. Without the support of a large megacorp to fund development, or being a labor-of-love indie project, which comes with its own downsides, it is very difficult to maintain the commitment required. And desipte common misconception, building a good browser is more than simply putting some sort of skin on a rendering engine, and shipping it. It's obvious when developers use that approach, and why most alternative browsers aren't worthwhile.
I don't see Orion that way. And the Kagi people aren't playing stupid games like the people behind Arc tried, by requiring signup to simply use the darned thing, even after it exited beta. Sorry, to me that implies ulterior motives, despite their promises, and not going to play.
In its current state, Orion isn't perfect, and has a long way to go. But it is promising, and with the limited number of good options on iOS, still something worth trying.