Namely no risk of you losing your assets due to technical glitch, fraud, or overextension. Of course this is not a substantial advantage, especially in the US, given the various non-technical (i.e. legal/cultural) guarantees against these failure modes. It doesn't overcome the disadvantages of e.g. having to physically protect your own assets - thus why people tend to use financial institutions.

Exactly, this isn't an advantage. If there's a technical glitch, there's insurance for that.

What else?

You may be missing the point of my original post. It is that there are not substantial advantages to decentralization.