You say "will already have information about postcodes and so on". How exactly do you get your hands on postal code geo data, have you tried that? Have you created your own geo postal code database, or maybe used an API. I'm talking international postal codes too.
I have, and I can tell you it's not easy, for example in Canada there are like over 10k postal code regions. Then imagine maintaining this dataset, no thanks.
Anyhow that's not the point, that's just one data set Tableau does very fast, but tomorrow could be something totally different and the next day, etc.
Sure for complex custom requirements no BI tool will work, but it's sure better than what people were doing just a few years ago with excel or hiring expensive firms.
I have, and I can tell you it's not easy, for example in Canada there are like over 10k postal code regions. Then imagine maintaining this dataset, no thanks.
Anyhow that's not the point, that's just one data set Tableau does very fast, but tomorrow could be something totally different and the next day, etc.
Sure for complex custom requirements no BI tool will work, but it's sure better than what people were doing just a few years ago with excel or hiring expensive firms.