York is compact in a way that most cities are not. The entire city centre fits inside a roughly two-mile ring, which means two people living on opposite sides of the old walls are still only twenty minutes apart on foot. That changes the maths of dating considerably.
On a national app, a first date requires planning: whose car, whose train, whose neighbourhood. Here, it is more often a question of which end of town. That friction reduction is not trivial. It is one of the main reasons people in smaller, walkable cities actually follow through on dates rather than letting matches go cold.
The catch, as any York resident knows, is the tourist layer. On a summer Saturday, Stonegate is elbow-to-elbow with visitors, The Shambles is essentially a theme park, and the queue at Betty's stretches back to the Minster. A first date in that environment is exhausting rather than enjoyable. The skill is choosing the resident half of the city: the coffee shops on Micklegate, the pubs in the Groves, the Sunday markets at Shambles Market when the weekday crowds have thinned. Local knowledge is the advantage, and the people on this site have it.
York's population sits at around 210,000, which is large enough to have a genuinely diverse dating pool and small enough that you will almost certainly share friends, workplaces or neighbourhoods with your matches. Worth factoring in before you start, but mostly a feature rather than a problem.