All hope for easy updates is not lost though. Topjohnwu has uploaded Magisk Manager onto XDA Labs, making it easy for users who want to remain on the latest version at all times.
XDA Labs is an app platform that serves as an alternative to the Google Play Store, and it is best serving its purpose in times like these. You can have updates to Magisk Manager pushed through XDA Labs, so we recommend installing XDA Labs to get notified whenever a new update to Magisk is available. This is also not the first instance where an app has been removed from the Play Store but continues to be distributed through XDA Labs, like AdAway.
As topjohnwu mentioned, an update to Magisk is on the horizon. Stay tuned!
Get XDA Labs Get Magisk Manager through XDA Labs Check out Magisk in our forums!