Whoa! Okay, so check this out—gas optimization isn't just a cost-saving trick anymore. It's table stakes. For serious DeFi users, every gwei, every ordering quirk, and every preview can mean hundreds or thousands saved (or lost) over time. My instinct said this years ago, and honestly, somethin' about the way trades get front-run kept nagging at me. Initially I thought faster tx = safer, but then realized that's naive; speed without context is risky, and sometimes the fastest route is the worst one.
Short version: a good wallet needs to simulate before it signs, and it needs guardrails against MEV strategies that prey on predictable behavior. Really? Yep. Transaction previews let users see the expected state change before committing, while gas optimization reduces slippage and failed tx costs. On one hand, a wallet that only sets gas to "fast" is convenient. Though actually—wait—convenience alone invites MEV bots. They smell predictable user patterns from a mile aw…