Even if you get these answers as an interview candidate, once you've joined the answers will become outdated … and for most of it, you won't be getting updated

Even if you get these answers as an interview candidate, once you've joined the answers will become outdated … and for most of it, you won't be getting updated information. While things like successful rounds of funding do get shared, enough information about the health of the company (e.g., revenue vs. expense? over time? runway? how expected projects you're working on either will or do translate to revenue, and how much?) to make a meaningful decision about whether the company is worth investing in or not just isn't ever shared, IME. With no real information, there is only one value that can be assigned to the equity: $0.