> Counter point seems to be Slack, which has become better (in my opinion) after the Salesforce Acquisition.
...which was only finalized about a year ago, and "phase one" of Salesforce's several-steps-plan that culminates in screwing up an acquisition is usually needlessly tinkering with pricing and packaging, which just happened recently [0].
The next step, if past patterns are predictors, will be an attempt to bundle Slack into their existing SKUs, then work on integrating Slack with their nightmare CRM codebase/dev-env, and then from there it's all downhill as velocity abruptly halts, the ratio of time spent doing meaningful work vs. time spent doing compliance busy-work stalls out completely, and the brain-drain begins.
[0] https://slack.com/blog/news/pricing-and-plan-updates