Lately, there's been talk about re-staking again, claiming shared security and yield stacking.

It sounds like just reheating the same meal repeatedly and calling it a new dish...
Honestly, the supposed stacking of returns might just be an illusion that also adds risks and fees.
You think you're arbitraging, but actually you're being exploited layer by layer by the rules, and in the end, you still have to pay Gas (yes, I've been educated about that).
My approach now is very simple: first, figure out the costs clearly; do batch processing when possible; don’t lock your funds into a bunch of confusing boxes just for a few extra points.
By the way, watching the community argue about privacy coins/mixing is quite similar: shouting about freedom on one side and fearing compliance enforcement on the other—most of the unlucky ones are ordinary people.
Anyway, I prioritize survival first; if I can't make money, so be it.