https://blog.chromium.org/2016/08/from-chrome-apps-to-web.html [blog.chromium.org]

From Chrome Apps to the Web

As we continue our efforts to simplify Chrome, we believe it’s time to begin the evolution away from the Chrome apps platform. There are two types of Chrome apps: packaged apps and hosted apps. Today, approximately 1% of users on Windows, Mac and Linux actively use Chrome packaged apps, and most hosted apps are already implemented as regular web apps. We will be removing support for packaged and hosted apps from Chrome on Windows, Mac, and Linux over the next two years.

There aren't too many Chrome Apps that I use. Most tend to be desktop ports of what are primarily mobile communications apps like WhatsApp and Signal. Those vendors are going to have to look at other solutions for their desktop apps. Given the low uptake it is doubtful many people will miss this functionality.