The last few days I'm working on my first Keto deployment, for the last few years we were using only Oathkeeper.
I didn't find any clear docs in regards the "new" Keto OPL namespace configs, had to go through the Keto codebase to understand how to configure it.. as the docs contain only a guide on how to configure the namespaces on Ory Network.. On the way I found several GH issues which pointed me in the right direction, so it wasn't that bad, but i had to push through quite a lot of hours.
If comparing now the Keto research with the research I had to do when integrating Oathkeeper a few years ago, I'd say the docs have gotten less helpful.. but also Slack activity(responses mostly) decreased. Personally I still believe in your self-hosted solutions, I'm just a bit sad that I observed this "negative" trend.