I haven't explored all of what Outlook can do but I assume it's like Jira and can do all sorts of things and integrates with all sorts of things. If you're jus

I haven't explored all of what Outlook can do but I assume it's like Jira and can do all sorts of things and integrates with all sorts of things. If you're just comparing basic email and calendar, I'm not sure. For enterprise, if you don't already have a competing product, taking on Outlook is a big gamble. For casual users, built-in email clients are probably good enough for most users.