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1. Many L2s don't want to give up sequencing rights
L2s earn revenue through sequencing, so it makes sense they don't want to give this up.
Furthermore, L2s don't want to replicate Ethereum's PBS issues or sequencing model. At the time, many of us thought that Ethereum's PBS issues could be solved through things like ePBS or execution tickets, and that once these issues were solved L2s would be fine adopting Ethereum's model. It turns out this wasn't true. Firstly, we still haven't fixed Ethereum's PBS issues (though we're much closer than we were a year ago!). Secondly, L2s are very opinionated about how their blocks are built. Many L2s specifically want to avoid their users being frontrun or sandwiched, and therefore do not want to hand over block building rights to people like the L1 builders, even if the L2s could keep their sequencing revenue. Other L2s have strong opinions about priority fee auctions, encrypted transactions, etc., which are often at odds with letting others do your sequencing. 1 reply
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