Sebastian is a beast. Unafraid of difficult-to-review changes and jumping into the underlying cryptography. Thank you for 5 years of Bitcoin open source contributions, theStack!🥂 https://brink.dev/blog/2026/04/26/sebastians-five-years/

Optech has no involvement with whether the community uses or activates something or not. We’ve covered statechains many times, had Nicholas Gregory on the podcast for Mercury, and have a statechains topic page that ranks #1 for “statechains”. I think you’re tilting at windmills.

What’s your favorite Bitcoin “progress” that Optech has “stalled”

400 Bitcoin Optech newsletters! Thank you to all who have contributed over these 8 years: Optech contributors, researchers whose work we have covered, engineers joining us on the podcast, and readers/listeners. 🧡 (Yes, its actually 401 newsletters, we started at Newsletter #0)

With an increasing number of discussions around the BIP54 “Consensus Cleanup” soft fork proposal, I helped put together an information site about BIP54. “Bitcoin has four known vulnerabilities that have gone unfixed for 15 years. BIP54, "Consensus Cleanup", proposes four narrowly-scoped changes to address these issues in Bitcoin's consensus rules that date back to the original version of Bitcoin in 2009.” https://bip54.org/