Consensus take: L2 interop is broken today. Narrative violation: the solution is simple and does not need any fancy new protocols or infra. The simple solution: a major L2 infra team needs to vertically integrate their existing stack from the protocol to UX layer, and enable 1-click user interactions across their ecosystem’s rollups. The core product requirement is dead simple: Move assets between rollups in 1-click, in < 1 second, zero friction. No context switching. What teams need to build: An embeddable UI widget that enables instant cross-rollup transfers across their ecosystem. The widget should: (1) auto-detect the best source rollup, (2) have configurable destination tokens (usually gas + USDC), (3) complete in < 1 second (4) require 1-click, with 0 additional steps (5) live in the dApp UI (as a sidebar/modal). Where existing “solutions” like bridge aggregators fall short: Existing solutions like bridge aggregators fail because they (1) require users to leave dApps for external websites—killing retention and (2) are slow, often taking minutes to settle, because 1-second finality is impossible without controlling the rollup’s sequencing infra (esp. given Ethereum’s slow finality). The last 20% is the hardest part of the problem. While this idea sounds simple, try moving assets from Base to {insert Superchain chain} dApp today—it's impossible to do it in 1-click, < 1 second, while staying in-app. Current solutions nail the first 80% but miss the crucial 20% which requires deep vertical integration across protocol, sequencing, bridging, and UI. Teams have historically focused on their narrow slice of the stack, resulting in a fragmented user experience. An existing rollup infra team is best positioned to build this if they vertically integrate their stack and distribution. A major L2 infra team (like OP, Arbitrum, ZK Sync, Conduit or Espresso) that controls the full stack, from protocol design, running sequencer infra, bridging and UI can build this product so that it Just Works TM for their entire ecosystem. They can push adoption through existing distribution and create a flywheel for onboarding more devs by solving the #1 problem for new rollups—onboarding new assets. The killer GTM becomes “Deploy here for seamless liquidity across all our rollups”. This is more powerful than any grant program and has clear network effects. The team that vertically integrates and builds this will solve Ethereum interop, create a GTM flywheel with clear network effects, and profit. Can someone please build this and save Ethereum?