Why bother setting up a hosted DB server when you can get all of the RDBMS optimizations in an in-process service? DuckDB is pretty cool

https://duckdb.org/

Obviously, I can’t tell you about the privacy implications of every internet routing device on the planet.

I was just trying to provide a more complete and longer TL;DR than the one I was responding to.

Sounds like you know what you are doing as well as anyone could, you don’t need my TLDR

TL;DR: Don’t buy Mesh WiFi, especially if offered at a low price/subscription by your ISP. Use old-fashioned routers and access points.

If you already have or really need Mesh WiFi, consider installing a VPN client on every single device that supports it. A VPN config on your router will not protect your data from the spying WiFi Mesh Pods.