Over the last ten years, cellular data availability has increased massively and the cost has plummeted. Many people don't have fixed broadband at all, preferring to work and play purely on cellular data networks. Which begs the question - why does Apple limit App Store downloads?
If you're trying to download a new app from the App Store, Apple has a hard coded limit of 150MB. There's no way for users to decide whether they are happy to download larger apps or not.
The limit used to be 100MB but it was increased to 150MB in iOS 11.
There is a rather cumbersome workaround, described at iDownloadBlog, which involves starting the download, going into settings and disabling automatic date and time setting, advancing the clock and then continuing the download.
Needless to say, this is a ludicrous process.
It's time for Apple to give users control of how they use their data. Sure, put up a warning letting users know they are initiating a large download, but give users the choice of how they use their data.