One place collapsing would be useful is if the revealed text turns out not to be what I was expecting. E.g. maybe I thought clicking Planck's constant would rev

One place collapsing would be useful is if the revealed text turns out not to be what I was expecting. E.g. maybe I thought clicking Planck's constant would reveal a number or equation. On the other hand, I could see the extra mechanic leading me to try to "curate" the article, which would distract from the actual content. There is definitely value in keeping it simple.