Somewhat hilariously this change stops any of the text messages from reaching the google voice web app in favor of hangouts (the web app being basically it's only redeeming quality at this point) and there appears to be some weird behavior when texting people through hangouts.

The webapp was the only reason I still bothered to use GV since it's felt like it's been abandoned for years now. It's frustrating how great this could have been especially with how early it originally came out, but I don't think it's worth it anymore - still no MMS (therefore no groupchat support). No notice of any of those failing either.

People are better off just using iMessage even though it isn't cross platform than dealing with this.

The two benefits I can still think of are that it's easy to switch carriers/numbers since your GV number is an abstraction and if you're out of the country temporarily you can still get texts to your American GV number. Really though FB/Whatsapp and a billion other widely used chat solutions have solved this and people in the US don't switch networks/numbers that often.