Ask HN: Is a regular developer blog desireable in a B2C SaaS product?

I'm in the process of starting a B2C SaaS product; and I'm debating on sharing regular updates about decisions I'm making, struggles I'm having, etc. Part of me is interested in using this product as a potential portfolio for my skills, in the event that the product doesn't take off, so maybe there's value in relaying what I've done and am working on, etc?

But also, nothing of my product can be bought yet - in fact, I'm still working on the prototype to share with friends to get their opinion on, etc, so it would be a blog on an under construction website, which doesn't sound great either.

Thoughts? I'd love to get knowledge and feedback here, I'm very new to all of this! Well, old dev, new marketer.

(reposted at new time of day hoping to get more traction :D)