But did they write the backend from scratch or was it based on a number of “com.apple.libs.backend-core…” that tend to bring in repeating logic and facilities t

But did they write the backend from scratch or was it based on a number of “com.apple.libs.backend-core…” that tend to bring in repeating logic and facilities they have in all their servers? Or was it a PoC they promoted to MVP and now they’re taking time to rewrite “properly” with support for whatever features are coming next?