From a visual perspective yes. However i must note without a JS blocker snowden's article from yesterday will weigh 2.41MB, including 1.22MB JS file, which is insane! Disabling JS brings it down to 1.16MB where images are the heaviest files, with about 40-210KB per image, which is reasonable.
So, despite all the bad things i think about that kind of industry, i must recognize that their website works well without JavaScript, does not block Tor users, and is not excessively heavy to load once you have disabled JS. I'm ashamed to say it because it should be the minimum quality requirement for EVERY website, but congratulations on making an actually usable website in 2021. That's apparently become such a technological challenge that most VC-funded startups are incapable to do it.
It almost makes me want to pay a subscription! But of course i won't do it, since Substack is not a non-profit. There's no reason i should subsidize evil capitalist shareholders with the little money i have to live, i'd much rather use it to support artists and developers directly via liberapay, opencollective and other more ethical venues that do not encourage centralized hosting of content.