The other examples weren't really monopolies. AT&T was a monopoly, but there were other camera and film manufactures even in the Kodak days. Just because they're the biggest doesn't make them a monopoly.

Google is probably the closest to a modern day monopoly in many (but not all) markets. The competitors like DDG, Bing and Yahoo make up such a small percentage of the market share that Google has become the de-facto standard for search, unless you're in places like China and Russia.

I'm using the term loosely too, because technically a Monopoly is when only a single supplier exists on the market. Typically monopolies start out as government agencies (AT&T, Telstra, TelecomNZ .. telecos are great examples of this btw) but the rest are really relative monopolies. There are other suppliers, but they pale in market percentage (Microsoft was declared a monopoly by many EU courts even when people were still using macos).