As a general rule of thumb, blockchains (both L1s and L2s) should never go down. Liveness is one of the few things we can do better than TradFi or Web2 systems, and must. But it's less bad when an L2 like Base goes down, for two reasons. First, the L2-centric scaling approach allows for market segmentation-different L2s can optimize for different features, like liveness, fees, throughput, MEV mitigation, etc. (an L1 can't do this, it has to optimize for the lowest common denominator for each feature, pleasing no one). So, it's not great that Base went down, but it's also not that big of a deal because right now Base is optimizing for consumer activities like content coins (whatever those are) where liveness isn't as important. I suspect other L2s will optimize for more wholesale DeFi-like activities like on-chain repo, and one feature they'll focus on is never being down. Ever. Also, if a properly designed L2 goes down, users will still be able to self-sequence and withdraw via the L1--a great feature, but one that requires the L1 underneath to really never ever go down or censor. If an L1 goes down, it's unclear if the assets on it even exist. In summary, blockchains should never go down, but it matters more when some go down vs others. A random L2 for a video game going down is just annoying, Ethereum going down would be total catastrophe.