Over the years Android OS is growing bigger and greater for an average user. It's great. Especially customization by installation of third party applications.However, I have noticed already around Android 5 or so that Google puts quite a bit of limitations on users, as well. For example not all applications can be put on a SD card when internal storage lacks of space.But worst of all is that we (users) were never granted a full control over our devices! I despise this approach, and totally don't understand why computer users may have administrative privileges on Linux or Windows, but we cannot on Android. That is simply unacceptable.