Microsoft Loop: built for the new way of work, generally available to Microsoft 365 work accounts

Yikes

First of all, 67% of statistics on the web are made up.

Third, Outlook has nothing to do with attachment sizes - that's a server-side function of the provider and it's up to both the sending party and recipient party to support it. If you are using 365 you can adjust the setting for your tenant, https://www.microsoft.com/en-us/microsoft-365/blog/2015/04/15/office-365-now-supports-larger-email-messages-up-to-150-mb/ or discuss with your IT.

Historically, email has not been a great candidate for sending large attachments. It's a technology that was created in the 70's when attachments weren't a thing. Nowadays it can be done, but there are still other systems that are better suited for transmittals of large documents, such as OneDrive.

Best of luck o/