What's the best way to store data with a plugin?

[Moin]

Your question reminded me of something I recently read on Meta.

@blake

“Are there any topics that talk about not using PluginStore anymore? Trying to figure out if I should use PluginStore or just make my own db table and columns in a plugin I’m working on,” the Discourse AI Bot responded with a helpful answer and even linked directly to our Development Styleguide describing exactly what I should use.