That article is 2 years old. In the last two years Kagi hasn't collapsed on itself, it's not overrun with AI, the world hasn't ended. They've implemented Privacy Pass, extended their browser support to Linux, introduced SlopStop for reporting AI websites, and generally continued to improve their main product.

Kagi is a business, run by people, who make decisions to the best of their ability based on their understanding of what's going to best serve their needs/priorities.

Like any other product, the owners are guaranteed to make decisions that are not aligned with a fraction of their prospective customers needs/views. That's what it's like trying to serve a broad market like "internet search users". Some of those users are inevitably going to get fired up enough to write a 20,000 word opinion piece on the subject.

For any service, you have to choose if the value proposition makes sense for you and your needs. For me, the value of most free search services has gone down the drain, and the value of spending monthly for Kagi is better than having to think about/maintain a SearXNG instance. YMMV.