I'm not very good at explaining those deep consensus mechanism details, but recently I've seen everyone complaining about "on-chain queue jumping," and I think I can understand why retail investors are upset. Basically, you think you're lining up in the open market, but someone can spend a bit of cost to push you to the back, resulting in slippage, failed trades, or even losing out despite clicking quickly. The experience feels like being "manipulated behind the scenes."

What's more subtle is that the earnings of miners/validators are increasingly dependent on these order-related fees, so naturally, they will optimize for it; but the part that gets optimized away is often the certainty for ordinary users. From a compliance perspective, it's also quite awkward: who on the chain is actually deciding the "sequence" of transactions? Once this becomes a default unwritten rule, it’s hard to explain later.

I myself now try to chase fewer hot topics and avoid rushing during crowded periods. I prefer to use limit orders when possible, even if it means being slower... Anyway, queue jumping doesn't necessarily hurt everyone, but those most affected are basically people without tools or information.