If cool means interesting then yes, it is cool because it's archaic and different but it's not effective. It's the equivalent of a verbal contract. It's simply not as clear or coherent as a written one.
Irish democracy in contrast uses STV voting and a written constitution and is modeled between the best of what the UK, the US and France had to offer when it was drafted and is a very representative democracy with many political parties compared to the duopolies in the US and the UK. It's also why Ireland is largely immune to hard shifts to the left or right relative to the UK and US.
Note that even though the U.S. has a Constitution, the entire U.S. government is still, like the UK, highly reliant on inexplicit norms many of which go back hundreds of years before the U.S. was founded. They’re both still English common law systems.
> duopolies in the US and the UK
for better or worse, the duopoly is disappearing in the UK. Both Tories and Labour are getting passed by Reform and the Greens
> It's simply not as clear or coherent as a written one.
No. As you have surely seen, the US written constitution just gets contorted to "clearly" mean whatever it is the partisan Justices decided suits their current purpose. The effect is extremely corrosive - they even decided it means their guy is above the law.
I agree that using a better voting system (STV) is a meaningful benefit and worth replicating elsewhere, but I don't agree that having a written constitution is better. I think Ireland would be in roughly the same place if it had the same arrangement as in Westminster in that respect.
For example when Ireland wrote a constitutional amendment saying abortion is illegal under basically any circumstances, the people the Irish were electing would also have voted against legislation allowing abortion, but by the time the poll was held to amend to say abortion must be legal, the legislators elected were also mostly pro-choice. So if there was no written constitution my guess is that roughly the outcome is the same, in 1975 an Irish woman who needs an abortion has to "go on holiday" abroad and come back not pregnant or order pills and hope they're not traced to her, and in 2025 it's just an ordinary medical practice. Maybe the changes happen a few years earlier, or a few years later.
Edited: Clarify that the abortion prohibition was itself an amendment, as was the removal of that prohibition.
I love this about Ireland because they are such a young republic. And democratic systems are a technology. Something that we understand better over time, and somewhere new can pick and choose from what is best, where it is _extremely_ hard to change existing systems in established countries.