Twitter is not exactly a shining light on the hill as far as being a good business.
Facebook is also starting to see the issue with being a one trick pony.
But as for as Google, how many failed “other bets” have they been throwing money at since they were founded?
Google was founded in 1998. About the same time that Apple was close to bankruptcy.
One year they introduced three messaging platforms. How many failed first party phone initiatives have they had including buying Motorola?
Not to mention Google Fiber that left city streets ruined with “micro trenching” (https://arstechnica.com/information-technology/2019/02/googl...)
Since then, Apple has grown the Mac business, iPhone, iPad, “wearables”, and has a growing services business.
Microsoft built Azure, Xbox and pivoted with Office365.
Amazon (disclaimer I work at AWS), built AWS.
Google has a lot of smart people. But not a good business development strategy.