Trezor Adds 128-Character Passphrase Support, Citing Coldcard Seed Flaw

Trezor is using a competitor's seed-generation failure as a marketing hook, but the underlying move matters: longer passphrases widen the entropy gap between a device-derived seed and a user-chosen secret, which is where self-custody risk concentrates. The framing ties Trezor's roadmap to Coldcard's incident, positioning passphrase length as a competitive differentiator in the hardware wallet segment. Whether other vendors treat passphrase entropy as a spec race or a UX trade-off is the open question, and whether users actually adopt longer secrets rather than defaulting to short ones.