Lately, everyone has been arguing about Layer 2—who has higher TPS, who has lower fees, who offers more subsidies...

I'm actually more worried about another small but deadly issue: oracle price feed delays.
You think your position is still safe, but on-chain you've already "crossed the line," only the price hasn't been fed in yet;
when the next update comes, liquidation will be settled all at once like a batch of homework submissions, with no reaction window.
What's more embarrassing is that if you want to add margin or reduce your position, gas fees make it even slower, and in the end, you just watch yourself get liquidated.
My current approach is pretty simple: avoid playing near the liquidation line with high leverage, especially on volatile days, I’d rather open fewer positions—
after all, life is more important than face.