I'm sure someone comes in periodically to check. Most car manufacturers realize how valuable feedback can be, and rather than reaching out to random consumers, they will generally browse various forums to get real world data, especially since most phone/mail surveys don't address specific issues or allow much elaboration. Browsing forums allows "common" problems to show up that might otherwise be overlooked through a survey because either it's not specifically addressed or perhaps the consumer feels it's not that big of a deal to mention.
I can confirm that there was one at one time in late 2015 when I was describing some strange behavior in my Gen 2 that I'd just had for a few weeks (happened again a couple months later and I had the HMI replaced) and got a PM from a GM engineer wanting to know more, and I sent him details from my car's software version specs to his email at GM.
So I can't attest to current status or frequency, but since the new Bolt deliveries are as recent as the Gen 2 Volt deliveries were back then, I would say the chances are pretty good that engineers are checking in to read about real-world experiences.
When I first got my 2013 Volt (in Aug of 2012) I found a software bug that when plugged in on 120V the car would not start charging when remote started below certain temperatures. I reported the bug on this forum. An engineer from GM PM'd me and told me they were working on a fix. Several weeks later he contacted me to tell me that my dealer should have access to the update. I contacted my dealer but they claimed they could not find the update. The engineer then contacted the dealer directly and I got the software update applied and it fixed the bug.
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