I was very disappointed as a first saw that change pop up in Chrome Dev for Android, but thought it was maybe a change of defaults and the option would get put in again before the release.
Now it's not in and I think thats very sad. It just degrades the open web in relation to native apps even more and the context switch between browser tabs and native apps is as big as it was years ago. Why don't keep the option?
I know progressive web apps that are added to the homescreen still have that functionality but the main idea of PWAs was that the move from a website becoming an app should be as seamless as possible...