Most episodes involve some fictional futuristic technology being abused, but that was one of the few episodes that involved only technology that definitely exists today.

• National Anthem
• Waldo Moment (arguable, as it would definitely take some tinkering to set up that kind of Vtuber system, not just using an off-the-shelf system)
• Hang the DJ (arguable, assuming what we are seeing is just a fictionalization of a bunch of software simulations)
• Metalhead (arguable, as robot dogs do not seem quite that advanced yet, but definitely soon)
• Bandersnatch (arguable that the multiple timelines and everything are just the character hallucinating or whatever)
• Smithereens
• Loch Henry
• Mazey Day (though the technology is absolutely contemporary, it does feature a mythological creature or whatever)
• Demon 79 (while it takes place in the past with just old technology, it features supernatural shenanigans again)

EDIT: Fifteen Million Merits is also barely futuristic technology.