Board Thread:Game Discussion/@comment-26388545-20190626002005/@comment-33870577-20190629051500

Starting from this August Google will calculate it over recent few versions:

"We’re also making big changes to another key source of performance data: your user reviews. Many of you told us that you want a rating that reflects a more current version of your app, not what it was years ago — and we agree. So instead of a lifetime cumulative value, your Google Play Store rating will be recalculated to give more weight to your most recent ratings. Users won’t see the updated rating in the Google Play Store until August, but you can preview your new rating in the Google Play Console today."

Apple is doing the same already but two years ago they came up with this: The new iOS App Store lets devs choose whether or not to reset ratings when updating

Tl; dr - no, ratings are not from prehistoric versions and reviews but are fairly recent.