In Roam-> Export All as Markdown. On PC-> Unzip that file In Obisidan (option 1) -> choose that folder as vault (option 2) -> use Obsidian Import Markdown core plugin.
🙏 Not that I don’t like roam. For some reason it hasn’t changed much in the last 3 years since it started. At least as it pertains to my simple note taking and thinking workflows. Want to try other things to see where the space is at.