When does ETH raise blob capacity?

TLDR

Ethereum (ETH) raises blob capacity on 7 Jan (UTC) via the BPO?2 parameter?only upgrade, increasing per?block data room for rollups as reported this week.

1. Target blobs per block rise to 14%%CKPROTECTED2%% and the maximum to 21%%CKPROTECTED4%%, expanding throughput for L2s per the weekly update.
2. It is a configuration?only upgrade designed to safely increase blob throughput without bundling a larger fork per a market brief.
3. More blob supply can reduce L2 data?availability fees if demand doesnt spike concurrently per the analysis.

Deep Dive

1. Date and Upgrade

The network raises blob capacity on 7 Jan via Blob Parameter Only 2 (BPO?2), lifting the target to 14 blobs and the cap to 21 per block as part of Ethereums scaling cadence after recent upgrades outlined here. A parallel brief emphasizes BPO?2 as a config?only path to expand throughput without a bundled hard fork in the market note.

2. L2 Cost Impact

Rollups use blobspace to publish batch data; increasing supply typically pressures blob fee rates down, which many L2s pass through to end?user transaction costs per the fee linkage explanation. The caveat is demand. If blob usage rises as quickly as capacity, fee relief can be muted, and stability needs ongoing validation at higher targets as noted above.

3. Roadmap Context

This step fits into a broader 20262030 path: near?term increases in gas/throughput, then deeper structural changes like moving execution payloads into blobs to make higher limits safe, and later much larger increases as ZK?EVM validation matures summarized in a roadmap piece.

Conclusion

Answer: 7 Jan (UTC). Ethereums BPO?2 raises blob capacity, expanding rollup data room immediately. If demand doesnt absorb the extra supply, L2 transaction costs should ease, with more structural scaling slated across 20262030 per the roadmap referenced above.