2005: Google Talk released.
2013: Google Hangouts released.
2015: Google announces Google Talk shutting down, encourages people to move to Hangouts.
2016: Despite Hangouts being a one stop shop for SMS and Chat, Google discourages people from using it for SMS, asking people to use the Google Messages app instead.
2016: Google Allo released.
2016: RCS adoption begins.
2017: Google Talk shuts down.
2017: Google Chat released.
2017: Hangouts is re-targeted for business and moves to some sort of consumer freemium model?
~2018(?): YouTube Chat released, a 1:1 messaging system inside of YouTube. No idea when it was discontinued but it didn't last long.
2019: Google Allo discontinued.
2022: Whatever was left of Hangouts is discontinued.
2023: RCS through Google Messenger is now default instead of SMS and group messages are finally encrypted.
Compare this to:
2011: iMessage released. As far as I can tell, it's been e2e encrypted since at least 2012 and potentially since release.
Google, you have no fucking leg to stand on. Get your shit together. If you had had a coherent messaging strategy, maybe Apple would have been amenable to working with you, but what incentive do they have right now? For all anyone knows, you'll drop RCS by 2026 in favor of moving everyone to Google Heythere, the new ridiculous app for messaging!