For the most current information on Google Play Services versions and compatibility, always refer to trusted sources like APKMirror and XDA Developers forums.
For a tech-savvy user willing to experiment, microG is an excellent way to breathe new life into an Android 4.4 device while maintaining a degree of privacy and avoiding the bloat of the official Google suite. google play service android 442 install
The honest answer is – if security matters to you. But if you are using a dedicated device (a car GPS, an MP3 player, a digital photo frame), installing the correct Google Play Services version 21.30.99 is the only way to keep the lights on. For the most current information on Google Play
