I love org-mode with all my heart. I used it to run a consulting company for a decade and organize my entire life (reminder to mail my mom a birthday card? Recurring org task. Task breakdown and schedule for clients? Org.) I used it to keep all of my implementation and debugging notes. I’ve used it like Jupyter notebooks with inline code blocks. I’ve written tons of LaTeX math in it.
For what I use it for, Org has a ton of magic sauce that Obsidian doesn’t have for me. But Obsidian has one feature that, sadly, dominates all of that magic: ease of use on iDevices, including offline use.
I can sit and work on Obsidian documents on my iPad+keyboard on an airplane without Internet access. I can reference my documents and update my todo lists from my iPhone without needing to SSH somewhere. The sync service is super smooth and the (much smaller) set of features is enough for most of my daily use.
I miss org-mode very much though and if I were to change jobs and spend less time work-travelling I would probably switch back to it.
One of the biggest reasons that I was comfortable using Obsidian specifically is because the disk format is mostly just Markdown (mod the infinite canvas stuff, which is documented JSON). Being locally-stored Markdown instead of a proprietary format, I feel like there’s a reasonable pathway for me to reimport all of my notes back into Org-mode in the future if I decide to go that way (eg Pandoc)