I don’t think bridging from L1 to L2s should be something we expose to general users.

It’s too expensive and confusing. 

Users should just withdrawal from a CEX to an L2 the same way they do to L1.

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I also think a lot of these cross-chain minting solutions can be integrated into wallets where apps and media will live on certain chains but the liquidity can come from wherever you have liquidity.

Part of the reason this is so seamless, though, is that the L2s all share the same base (the optimism stack) things will get more interesting when it's between L3s or ZKChains where behaviour varies slightly chain to chain.

Exactly.

Deposit to one L2 (Base/Zora/Optimism), do things on any L2.

No bridging.