Chromium based browsers are beholden to Google's whims the same way Firefox forks are to Mozilla's. I expect those Chromium browsers planning to continue support of effective APIs for adblock will soon find they don't have resources to maintain those patches as more of the underlying infra gets removed from upstream, for example.
My level of trust in Mozilla has fallen, but it still doesn't look likely to fall below my trust in Google in the short to medium term