I get what you're saying about a proxy like this, latency & performance would suffer, however minor, and in production DB land this really matters.

I've just not sure it is much of a slight on such proxies.

You don't need to run this always inline in production to get amazingly useful results. Yes, there are lots of production insight solutions out there, but lots of modern stacks can be complex enough that just getting a quick handle on how the page you're debugging talks to your DBs can be incredibly useful, which is where I love the idea of a solution like this.

Sure, it is mytop / pgtop, but trying to offering it at a different layer & with a modern interface. Seems useful to me.