Here's something you don't hear every day: someone is voluntarily opening an upscale restaurant in the Financial District.

The duo behind Caché, the modern French bistro that's already built a loyal following, is expanding into FiDi with a new fine-dining concept. It's a bold move in a neighborhood that's spent the better part of four years looking like a post-apocalyptic movie set — minus the dramatic lighting.

But let's talk about why this actually matters.

For all the doom-and-gloom headlines about downtown San Francisco, the only thing that's going to bring the neighborhood back is private investment from people willing to put their own money where the city's mouth is. Not another task force. Not another "vibrancy plan" cooked up by supervisors who haven't eaten lunch south of Market in three years. Actual entrepreneurs taking actual risks.

That's what this is. A team that looked at FiDi's empty storefronts and half-occupied office towers and saw opportunity instead of obituary. Whether you're into French cuisine or not, you should be rooting for them — because every new restaurant that opens downtown is a vote of confidence that the rest of the city desperately needs.

The restaurant renaissance downtown has been slow, uneven, and entirely driven by the private sector. The city's contribution has mostly been staying out of the way (when it manages to do even that). Meanwhile, restaurateurs are the ones actually doing the hard work of making neighborhoods worth visiting again.

Will it work? That depends on a lot of factors — foot traffic, office return rates, whether the city can keep the surrounding blocks reasonably clean and safe. You know, the basics that shouldn't be a question mark in a world-class city but somehow still are.

We wish them well. FiDi could use a little more joie de vivre — and a lot less government-subsidized emptiness.