without bullshit:

Slack wrote an open letter to Microsoft, ostensibly welcoming it to the market for workplace collaboration systems. It’s a weird hunk of prose, direct and honest on the surface, but fundamentally insincere. The choice to publish this letter — and to fill it with platitudes — makes me question the judgment of the company.

I must say that as much as I love Slack, I found their Letter to Microsoft a little off-putting.