[mule1]

It's an incredibly complicated problem that is currently being worked on by ETH developers. However eventually this will be seemless for an average user. You can be using Uniswap for example on an L2 like arbitrum or zksync and have no idea your ETH is even there. Also ramps are being built to directly deposit into L2. The gas fees from bridging in and out of L2 will be solved when the majority of the traffic is happening on L2, the ETH L1 blockchain will only be used as a settlement layer for L2 traffic and much fewer transactions. Sharding which is coming will also bring down fees a ton for all settlement transactions in ETH L1.