The problem of Brave is that at heart it's still from an advertising company, no matter how nice they come across.
Advertising is inherently at odds with productivity (ads waste your time) and potentially privacy (for better ad targeting), so I wouldn't recommend it.
Under the hood it's just a reskinned Chromium so the battery life & performance concerns remain.
By default, Brave blocks ads and their ads platform is disabled.
As for Chromium's performance, I think it'll improve over time as MS started using it for their Edge browser and are committed to improve performance and battery life.
Stating that they're simply an advertising company misses a significant amount of innovative work they're doing in-browser too.
They're building a new business model and infrastructure that is diametrically opposed to the current surveillance capitalism model, and this infrastructure can replace donations, sponsorship, advertising and subscription models in a way that reduces transaction friction significantly, and could very likely challenge a significant number of powerful incumbents.
If you check out Brave’s own website or Wikipedia page their whole model is to block ads and replace them with their own advertising network based on a crypto currency which allows you to earn it while you browse and see their ads.
Advertising is inherently at odds with productivity (ads waste your time) and potentially privacy (for better ad targeting), so I wouldn't recommend it.
Under the hood it's just a reskinned Chromium so the battery life & performance concerns remain.