It will probably be a feature of Slack within a year.

Except perhaps (haven't checked the APIs recently) the "time read" feature, I'm pretty sure most of it can be done today with Slack apps. Certainly, "Standup" apps which replicate the "log what you did today" feature are two a penny (and, to be fair, if I'm on a project which needs fine-grained synchrononization, I find this infinitely preferable to physical standups...)

Hard to think of a feature that could destroy whatever good will Slack has with users (if it still does) then a feature that lets you “ping” and notify someone else endlessly.

Slap some copy about empowering end users/workers and some illustrations of people with heads much smaller than the rest of their bodies, and it's ready to bring about a new VC round.

It practically is a feature, you can see whos offline and who is not. Its just done manually now not automatically.

But there's other alternatives to slack, such as Zulip

I will give you a raise, if you let me track you, so I can make sure you get enought sleep and exercise!

Dingtalk actually has a feature that lets you record steps/exercise even though I never used it

Oh it absolutely would. Most chat clients let you “buzz” another user in the 90s. And Amazon times the movement of its warehouse workers down to the second already. You will see this at a least one major Western company by the end of the year, I’ll wager.

I'm not so sure. If people really cared about tracking to that level, you'd think the modern web wouldn't be possible. And those people aren't even your employees.

People will sell their privacy for far less than we imagine.

And it's not just the modern web. Anyone remember the Outlook plugs that gave you smiley faces, when in reality it was ubiquitous tracking and advertising malware? Your privacy for an emoji.

You haven't worked for large companies then ;-)