I don't understand how this format keeps coming back. On mobile (which doesn't have reading mode) it is literally unreadable over such a noisy animated text-filled background.
Good for you. Now think about other people who are not like you.
I was able to read it, but only with difficulty. The background animations are super distracting and siphon off mental effort required to ignore them and focus on the text. Many people can do this relatively effortlessly, but for people who can't, the website is far less accessible than it could be.
I was reading it OK, but my browser performance kept deteriorating as I scrolled, until it crashed. Then I opened in another browser with NoScript and all was well.