That is not possible as long as Samsung and LG and the other manufacturers put skins over android. They are not going to stop doing that. Many of us use the Note 8 for the S-Pen. Well the functions of the S-Pen are baked into the Samsung Experience that goes over android. That isn’t going to be updated in only a few days. I don’t want a rushed update full of bugs. If you want instant updates, buy a Pixel.
Also, you can’t compare Apple to Samsung when talking about updates. So many differences in so many ways. iPhone vs Pixel, yes but as soon as a manufacturer adds a there own spin on android it’s over for quick updates. Buy a phone because you like what it does in its current state not for what may or may not come.