One objection I have to the kagi smallweb approach is the avoidance of infrequently updated sites. Some of my favorite blogs post very rarely; but when they post it's a great read. When I discover a great new blog that hasn't been updated in years I'm excited to add it to my feed reader, because it's a really good signal that when they publish again it will be worth reading.
To clarify criteria is less than 2 years since last blog post.
I'm with you. Also, sometimes I'm specifically looking for some dusty old site that has long been forgotten about. Maybe I'm trying to find something I remember from ages ago. Or maybe I'm trying to deeply research something.
There's a lot more to fixing search than prioritizing recency. In fact, I think recency bias sometimes makes search worse.
http://borg.uu3.net/~borg/?fun/wisdom_of_the_ancients