Tangential anecdote: when I visited San Luís Potosí, I ate several meals at a place called Café Tokio. It was good but there was nothing Japanese about it beyond the name.
I think a lot of what drives the creation of redundant open source tools is that the urge to address a matter of personal taste meets the urge to start a new project, so people create new things that are different in key ways from older ones, but not necessarily better, and not necessarily even different enough to justify the amount of work that goes into them.
In some ways it feels a lot easier to start a new project then to build off an existing one:
You don’t have to familiarize yourself with the old code, which may be in a language you don’t know or don’t like
You don’t have to deal with the existing maintainers, who may or may not be supportive of the changes you want to make
You don’t have to support use cases that don’t matter to you personally
As far as I know, Brexit was caused more by Brits not liking economic policies of the European Union, though I am not that knowledgeable about UK politics.
I’m not that knowledgeable, being an American, but my understanding is that Brexit was mainly the result of racism, and of English people falling for easily disproven lies about the economic impact of EU membership. I’d like to think that what I lack in direct experience of British politics, I make up for with direct experience of the exact same bullshit in American politics.