and the total usage of safari across all device types allows for a certain percentage of users in the wild which acts as the size of the lever apple wields for changes they want (or don't) in the specs.
Last time they posted numbers, they were selling around 200 million iPhones a year, 45 million iPads and maybe 20 million Macs. The Mac market share is insignificant even to Apple in the grand scheme of things.
Any web standard is useless without Apple being on board. Developers either won’t implement it or create an app for iOS to use a feature they need.
Even with your numbers, 1/10th the sales for a more expensive product isn't insignificant. It's especially important for their brand value as a tech company.
