Would an extension that helps physical stores forecast walk-in traffic be useful?

[Percolata]

We are trying to figure out whether there is enough interest in this before bringing this extension to Magento.

[Hlinh]

Store Locator can be your best solution for you. It allows your clients to easily find and see full list of your stores even the nearest stores to your clients' location and the available products of those stores that clients want to buy. Your stores will be shown on Google Map and much more

For M2: https://www.magesolution.com/store-locator-magento-2.html