ENS, Synthetix and Others Return to Ethereum Mainnet as L2s Shut Down

The retreat from dedicated L2s is a notable signal that Ethereum's own scaling gains are reshaping build-versus-buy calculus, and the economics cited for Blast's shutdown — costs outpacing revenue — suggest the rollup model's margins are thinner than the launch wave assumed. Projects that anchored their roadmaps to custom chains now face a credibility question, while mainnet deployment may become the lower-risk default for smaller teams. Whether this becomes a broader migration or a handful of isolated reversals is the open question, and the next test is how other L2-dependent projects frame their own roadmaps.