They sold me their top-end phone, years ago, for a top-end price, on the basis that they would update Android in the next three months. It was a nice phone, but three became six, which became a few years - three or four or five.
Eventually they did offer the option, of course by then I was not using the phone, but I tried to upgrade anyway, and my phone would not upgrade. There was no support when I asked apart from 'download it and it should work'.
So in answer to your question, it's not about Samsung, it's about LG for me - and they destroyed all credibility with me - I don't believe claims on build quality, I don't believe claims about support, I don't believe any of their advertising. And I actively advise friends not to buy their products, when asked.