Edit: spelling
Now, if I miss a call, it forwards to the GV number. So I get transcriptions (via email) which aren't perfect but better than anything else I've seen.
9 times out of 10, I don't need to call the person back. It's a reminder, it's somebody I'll see later that day, etc.
I do wish that GV would not send me notices that I have voicemail when the person (or more likely a computer) hung up when they heard voicemail.
The GV number is also useful for things that insist on SMS where I want a secure number. No way for a person to go into a store and insist on getting my number transferred to their phone.
The point of this shutdown (and the Google+ shutdown) is that the services are going away for consumers, ie. moving to completely focus on GSuite integration. Google voice is still in the "Additional Google services" category and doesn't have GSuite integration beyond call-in Hangouts, so I doubt they will abandon their fiber G Voice customers any time soon.