Slack and Zoom both predate Teams. Teams only gained penetration through bundling with the rest of MS products on large enterprise contracts.

There are already open source alternatives built for both Teams and Zoom. The issue is that open source projects don’t have salespeople that will promise compliance and integration (whether or not they can actually deliver).

He wasn't dismissive, he was countering dismissiveness. It was dismissive to throw out "just build your own". 99% of companies don't have that option, most companies are customers, not builders. This commenter was pointing out the obvious lack of perspective on the majority of businesses. That is a huge problem in SV and software development these days, the lack of awareness and context about real problems out in the market. "Just build a replacement" is a non-viable route for most people and most companies.

I think it's dismissive to say that explaining something is harder isn't important.

And something being harder stopping your from doing it is ubiquitous in life. It's a good skill to know how much effort something will take and weighing the risks and rewards.

Slack is not open source. Neither is Zoom.

Your comment is just fake empathy noise.