Crouton no longer works on Chrome OS. Is there another way to install Ubuntu on it?

thanks for taking the time to look this over. It used to be that one could use Crouton to help install Ubuntu on Chrome OS. I did this years ago. It seems the newer versions of Chrome don't allow Crouton anymore. Just wondering if there's a way to install, say, the Unity desktop running either alongside or instead of the OS that makes with the chromebooks. Note: I tried the Linux stuff that now comes with the newer versions of Google's OS. But I don't know if that's the answer or, if so, how to utilize it to install Ubuntu.