tldraw makes a flexible drawing canvas, but a replacement should be judged by what happens to the drawing after the session. Create a test board with shapes, handwriting, an embedded image, and two collaborators.
Close the browser, reopen the board from another profile, and confirm what survived. Save a native snapshot and attempt to restore it on a separate installation. Then export an image and distinguish that view-only artifact from an editable source. If you embed the editor in an app, also test migrations after an application update and loss of network connectivity.
tldraw's persistence guide describes browser storage and snapshots. Record your actual storage and backup setup; the demo canvas alone does not guarantee long-term retention.
Akousa