This is really great for Shippo, and an issue that I've commented on before[0]. It's a pretty obvious feature to have missed in the first place, but taking on the insane complexities of UPS, FedEx, and USPS is a never-ending up-hill battle (I've done it.)

I'm still longing for the day that Shippo is fully fleshed out so I can offload that massive infrastructure headache off to someone else.

[0] https://news.ycombinator.com/item?id=11871297