They're as close to stock Android as it's possible to be without being a Pixel or a Nexus.
Only time will tell how they perform with OS updates. But mine came with Nougat 7.1.1 and the September security patch out of the box. So it's a solid start.
This is awesome news! I've even heard they they received their security patch update before the Google pixel did (which is my current phone) Nokia is more like a flagship name then some of these other companies and they have been around for a long time
Hopefully when Nokia 9 is released it surprises a lot of people including me in a good way. Competion and more choices are always a good thing . Looking forward to see what they bring to the table next