Upgrade frequency (per 90 days)

Usual (USD0 / bUSD0 / USUAL)'s assessment for RD-F-137 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

bUSD0 proxy: 9 Upgraded events since June 2024 — ~3 per 90 days at peak. DaoCollateral upgraded Dec 2024, SwapperEngine upgraded Dec 2024. High historical frequency; appears to have slowed in 2026 (last bUSD0 upgrade 2025-12-10). Yellow for high historical frequency.

Sources #

Internal
Usual profile — upgrade history00-profile.md §3: DaoCollateral impl upgraded 2024-12-17, SwapperEngine upgraded 2024-12-17retrieved 2026-05-17
Etherscan
bUSD0 proxy — Upgraded events (9 total)0x35D8949372D46B7a3D5A56006AE77B215fc69bC0 events: 9 Upgraded events from 2024-06-05 to 2025-12-10retrieved 2026-05-17

Methodology #

Count the number of contract upgrades in the trailing 90 days via on-chain upgrade events.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol usual factor RD-F-137 score yellow collected_at 2026-05-16 20:39:44