I love rollups and I have full confidence in upcoming interop but... try moving USDC from Base to Polygon today, it's kinda brutal.

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Polygon PoS and not zkEVM? That’s a side chain though, a bit different from bridging to proper L2s. Your argument still stands that better interop is needed, of course

Good point. Wonder if Base to Arbitrum is much better. The issue was that hop.exchange et al had no liquidity for that pair and USDC.

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