Well, updates often aren't a problem because they only download a diff patch rather than the entire app again. This has been the case for years. since iOS 7.1: https://developer.apple.com/library/archive/qa/qa1779/_index.html
However, Apple have recently upped the limit to 200MB on mobile data: https://9to5mac.com/2019/05/31/apple-iphone-cellular-limit-increased/
Also as it mentions there, with redundant parts of whatever app not being downloaded, the app can still remain under the limit. Like iPad UI elements not being downloaded on an iPhone for example.
However, Apple have recently upped the limit to 200MB on mobile data: https://9to5mac.com/2019/05/31/apple-iphone-cellular-limit-increased/
Also as it mentions there, with redundant parts of whatever app not being downloaded, the app can still remain under the limit. Like iPad UI elements not being downloaded on an iPhone for example.
