Means Google is going the Apple way by removing features quietly and making it more hard for us to personalize the system.
Maybe you've heard of Google giving an ultimatum to sms backup and phone audio recording app developers to compulsorily make their app target Android Pie. Thing is, in Android Pie, those sms and call recording options are not there in default apps.
So to target Android Pie, those app developers have to take permission from Google and write them a letter asking for those permissions.
And Google is by default not allowing these app developers permission to record calls or backup sms saying those permissions are not required by those apps for working. In Android, if you don't explicitly add those permissions during compiling the app, the app will just throw errors and will not work. So Google is killing all such sms and call recording apps now for some reason. Deadline is this November I think.
ACR call recorder, SMS Backup and restore, etc all app developers have been denied permissions and told to take a hike by Google. All of these are top grossing apps and very well known. So you see where this is going. Today sms and calls, tomorrow, something else.
Edit: Seems even wifi is being throttled starting Pie.
https://www.xda-developers.com/google-restriction-sms-call-log-permissions/
https://www.reddit.com/r/androidapps/comments/9wekm4/discussion_why_did_google_remove_internet/
https://www.reddit.com/r/tasker/comments/9w2cq6/google_is_taking_away_smsmms_and_call/
https://www.xda-developers.com/android-pie-throttling-wi-fi-scans-crippling-apps/