Certain SharePoint features are available only if you're on modern. Are you on modern yet?
For a long time, you could work together only with your colleagues. But this is no longer the case. Here is why.
In the past, you might have built SharePoint-only applications, but that's no longer the case.
What's the first impression of the thing you're building?
Did you know that you can use SharePoint Framework to also build applications for Microsoft Teams?