I feel like I'm taking crazy pills or misunderstanding you. Shouldn't it matter that they are using 70mb of RAM more or less totally wastefully? Maybe not a deal breaker for Brave, sure, but waste is waste.

I understand the world is about compromises, but all the gains of essentially every computer program ever could be summed up by accumulation of small optimizations. Likewise, the accumulation of small wastes kills legacy projects more than anything else.

It could matter but what isn't clear to me is if 70MB is wasteful in this specific context. Maybe? Maybe not?

Flagging something as potentially problematic is useful but without additional information related to the tradeoffs being made this may be an optimized way to do whatever Brave is doing which requires the 70MB of RAM. Perhaps the non-optimal way it was previously doing it required 250MB of RAM and this is a significant improvement.

Yes it can be construed as wasteful. But it's exactly that, a compromise. Could the programmer spend their time better elsewhere generating better value, not doing so is also wasteful.

Supply and demand will decide what compromise is acceptable and what that compromise looks like.