I have absolutely no idea why Great Northern has become so popular, but at my current and previous golf club it is the most popular beer, I take my hat off to their marketing department. Amazing how they managed to promote a beer without body, without flavour, without taste, and without any hint of hops, to the extent they have.
As for MG, wouldn't touch it even if it was offered free. Had a holiday in Tasmania recently and when I got to the rental counter I asked what car they had reserved for me. MG they said. I'm not driving that I said. What else do you have? Well, we can upgrade you into an Audi. That'll do I said. Lovely, driving in the style we do at home.
As for the sad demise of craft breweries, I tend to agree with the reasons generally expressed in this thread. Covid, cost of living issues, excessive tax compared to many other countries, over supply, and lack of outlets, and wholesale prices dictated to you by the large chains are all features of what's happening. If you don't have at least a bar with an attached food outlet, you'll struggle.
And so many of the beers now show little to distinguish them from each other. For example, almost every IPA I try these days is much the same to my taste. Not really enough bittering, and over hop flavoured with flowery juicy fruity hops. I still prefer beer, not hop juice.