Recently, someone asked me again whether yield aggregators are really good or not.

To be honest, it looks very爽 with an APY line, but behind the scenes, there are actually several layers of contracts "passing on" to you,
and you may not even be clear about who the counterparty is.
One layer of contract after another, and if something goes wrong, it's not just your own clumsiness...
Now I tend to first review the process: where the money actually went, who can move it, and who bears the responsibility if something goes wrong.
Especially recently, everyone has been complaining that validators/miners rely too much on MEV, and the ordering isn't very fair.
You might think you're earning interest, but you could actually be giving others traffic.
And there's one more thing I need to remind myself: I mistake simplicity for a trap.
Anyway, slower and less, sleep more peacefully.