Sometimes I feel bad about how many times I’ve revamped the main model in my PhD, but Google makes me feel a lot better about it.

Google has launched Chat, its latest revamped messaging strategy. But the company has struggled to get its services in order for years, from Talk to Hangouts to Allo.
— Read on www.theverge.com/2021/6/21/22538240/google-chat-allo-hangouts-talk-messaging-mess-timeline