Supernote as e-reader

Amazon's recent announcement about prohibiting users from downloading e-books has led me to decide that my next e-reader won't be a Kindle. I've been looking at Supernotes anyway but I think the size I get depends on whether I use it as my primary e-reader—I feel like the Manta Nomad will be more comfortable.

Does anyone use a Supernote as a primary e-reader? How well does it work for you, compared to a Kindle? How well does exporting highlights work? (The ultimate destination would be Obsidian.)