The amazing thing is that there is almost always an open-source alternative that is 10x better in many ways, in the case of slack https://mattermost.com/
I'm looking forward for AI to make it very easy to deploy your own tools and walk away from all this SAAS.
slack, jira, notion, even google suite
AI makes the cost of software development much lower, which means you can have a very good alternative that you can self host.
I'm thinking of companies that has 1000+ employees that pay millions annually in SaaS subscriptions.
SaaS is a tax on b2c business that will be reduced.