But it does go down very often and requires "engineers" to bring it up. That's not a decentralized Blockchain at all. Why pretend it to be?
As far as I can tell there is no fundamental design flaws in Solana that makes it so that it will always go down. There are bugs in the networking stack that are being fixed.
An no, "engineers" don't bring it up. I run a validator and only i'm incentivized to restart it back up because of my stake.