Just wanted to chime in that this is a devastating decision for me too. Completely disrupts my workflow on my work computer which has standalone Outlook installed (to be precise, it's Microsoft Outlook for Office 365 MSO, 64-bit, part of the Microsoft Office 365 ProPlus subscription product). The Evernote Clipper add-on was crucial to filing emails into Evernote efficiently.
My company locks down the settings, so I can't access to the web version of Outlook, and even if I could, I can't install the new add-in through the Microsoft App Store ("Sorry, Microsoft 365 has been configured