That only works if you only need to use Slack alone or whatever. The moment you have to use more of these annoying services at once and manage N different stupi

That only works if you only need to use Slack alone or whatever. The moment you have to use more of these annoying services at once and manage N different stupid client apps for Y different platforms (desktop/mobile), the lack of open/shared protocol becomes a major issue. Let alone if you want to use them on emerging mobile OSes that are not a hellhole of data thievery.