Due to prevalence of native apps in the macOS world, the difference are often stark. I use Things and Bear, and it’s fast, then try to load gmail (dump account, so it’s not in Mail) and it’s so slow. Youtube too. Fastmail, in comparison, loads like it’s on localhost.

You block JavaScript and the amount of sites that is broken is ridiculous, some you would not expect (websites, not fullblown interactive apps).