I use Zeus for when it happens.
Meetups are our best shot at making bitcoin payments ubiquitous. Businesses will not want to accept bitcoin if it won't bring more customers. BTCpayServer has come a long way. We just need education.
I hear ya, grass roots has gotten us this far. We need it in people's faces as a normal built in feature. You know all those places that turn the square screen at you? If it showed bitcoin as first option..
I know a guy who sideloaded BTCpayServer onto a Toast POS terminal st a couple fast food restaurants, but it's just a website. A $60 tablet or old smart phone would work.
I have Zeus on android that is linked to Square. I am talking mass appeal. National marketing.
Jack Mallers tried that, but suits are a tough nut to crack. Small businesses will also be hard, but I'm optimistic. We need better marketing and a bitcoin geek squad willing to help set up infrastructure.