What makes you ask one of your contacts for their physical address?

Mostly just if they invite over to their place 😅.
Or if I drop them over/pick-up.

For phisical order delivery more rare, more family stuff..

Or let's see your house on Google maps for some fun to someone who never looked at it..

Yea I don't have many address, no need usually, unless you phisically meet or send some package.. 😏

If a customer I need it for financial purposes (e.g. invoice). For customers or friends, I may want to post them something.

One idea I've informally validated was the need to collect addresses in order to ship gifts to (business or personal) contacts.