I'm more impressed by the architecture, which resembles that of room-based online games. After all, online game is the ultimate real-time collaboration system.

I'm more impressed by the architecture, which resembles that of room-based online games. After all, online game is the ultimate real-time collaboration system. The only difference is that, in figma, room states are saved (backed by S3 and the lousy "disk" cache). The file <-> database contrast feels rather moot, because it's natural to have metadata in usual DBMS and blobs in object/file storage (or in blob column).