My use case for Zoom involves a half an hour meeting that we have daily during which someone shares their screen and we go over the plan for today, what went good in the past day, and various details. Afterwards, I pair with a colleague of mine and we either share screens or I share my screen. We collaborate on tasks that we have using Zoom, but the share screen functionality is a must. If this was not present in Zoom, we definitely wouldn't have used it.
I value the chat feature in Zoom as much as the screen share, and whenever we have a meeting, we also have a chat, but it's nowhere near what Slack provides. Slack has way more options such as replying to a thread, but also sending that message as a last message in the chat box.
Breakout rooms in Zoom have helped facilitate more focused group discussions in my virtual meetings because you simply don't have to search for links to join other Zoom meetings. You just have one big call in the morning and afterwards, you split into the breakout rooms. Whenever I'm leaving my current breakout room, I'm returning to the main one, which is convenient because I don't have to search for any link to access it. Whenever I'm looking for someone, I can just browse to the breakout rooms and see whoever is in that room before joining. I don't have to join each and every room to find someone; I directly know where he or she is at.
This helps my focus as you have separate rooms for separate purposes, which is what my organization does. We keep specific rooms for specific purposes based on the name, such as one-on-one rooms prefixed with 'one-on-one' and pairing rooms prefixed with 'pair.' It's just a basic setup, but it's pretty handy.
Zoom has positively impacted my organization because it's essential for communication. Otherwise, we would not communicate the same way. We can see each other, we can hear each other as well. We use it daily for demos and for one-on-ones. It's a tool in our arsenal that is essential. We haven't used Microsoft Teams or Google Meet, so it's hard to compare it to anything else, but we are very happy with Zoom. We see no need to switch from Zoom yet. It fulfills all our requirements, which are pretty standard: just video and audio, and also the breakout rooms.