I agree totally!! For some reason, the programmers at Apple feel they must come up with worthless
changes to justify their existence. I continually have to go back to old versions to get something that runs with common sense. I just had to migrate my files to a new computer, and of course, it upgraded my Itunes to 12.8. The column browser is too much like work now. Something that simple and the f it up.
When I finally found out how to find the browser, it's limitations were incredible. All playlist browser features were gone. Only after reading hours of google post, did I finally find the solution from a kind sole.
In your playlist, select the playlist, you now have to go to View-View As, and select songs. The browser then should appear for that playlist. Big news flash, it's only for that selected playlist. If you want the browser in all play list, you have to repeat the process for each one individually. it does seem to retain it once you have made that selection. TOO MUCH LIKE WORK. Good luck my friends and vent your frustrations with these "self professed over achievers"!