Delayed hydration
Four blocks appear at 300 ms, 1.2 s, 2.5 s and 4 s after mount. No network request is involved, so waiting for network idle returns long before the page is complete. SAMPLE content only.
0 of 4 stages have arrived.
Stage 1 — not yet.
Stage 2 — not yet.
Stage 3 — not yet.
Stage 4 — not yet.