The real question isn't whether minimalist wallets work - it's whether you'll actually stick with the discipline they demand. I went through this about three years back when my leather bifold started falling apart. Rather than replace it, I grabbed one of those RFID-blocking slim wallets and forced myself to carry just what I genuinely use: two credit cards, a debit card, my driver's license, and maybe one loyalty card. The first month was painful. I'd reach for my pocket expecting something and it wasn't there. But here's what I found: I actually stopped needing most of what I used to carry. No receipts collecting in there, no expired cards, no old transit passes. My back pocket stopped feeling like I was sitting on a brick, which genuinely matters if you're active - hiking, camping, anything that involves hours of actual movement.
The catch is that if you live a life that requires constant access to different cards or documents, a minimalist setup becomes annoying fast. I travel maybe twice a year for work stuff, and those trips are the only time I break out a small cross-body bag anyway. The slim wallet stays in my pocket the rest of the time. Where most people stumble is they buy the thing but don't actually curate what goes in it - they just jam the same 8-10 cards into a thinner form factor and wonder why it still feels bulky. That defeats the entire purpose. If you're someone who genuinely uses five different payment methods or has to carry multiple ID documents regularly, a minimalist wallet won't fix your problem; you need a better bag situation. But if you're just carrying extra stuff out of habit? Yeah, the slim approach actually works.