I'd very interested to hear more about your workflow, because lack of inking/handwriting recognition in apps like Obsidian is what keeps me on OneNote (and from going fully Linux). Can you edit any of these ink based formats later in Obsidian, or are you limited to only viewing static images of things you've drawn/handwritten elsewhere in the past?
EDIT Searching around the web indicates that you can only draw on top of images of the writing later, not edit it. Alas.
Do you need to be able to edit ink on your computer? If editing ink on-device is all you need, e-ink tablets that use PDF as their native file format (like the DPT-RP1 or Quaderno) fit well into an Obsidian workflow. You can sync/roundtrip the files back and forth to your device for editing.
EDIT Searching around the web indicates that you can only draw on top of images of the writing later, not edit it. Alas.