I’m sure other people know more about this than me, but I don’t think there would really be any room, given the Jungle Cruise boat maintenance area that sits behind the treehouse.
And very important for the spreadsheets… it’s CHEAP to operate (sometimes has a CM at the entrance, but it’s 100% not needed and decently rare to see), and it has a CRAZY high capacity to my knowledge since it’s a walkthrough. Also, I always see quite a few people using it.
Since this is obviously about the RoA ordeal, in my opinion this is the difference.
Both - High capacity, have “historical” and atmospheric value, and don’t get large crowds
RoA/TSI - Costs a decent amount to operate given the number of CMs, is probably a maintenance and custodial nightmare given how remote TSI is, and lots of space that is essentially unused or open for development if replaced.
Treehouse - Sits on a tiny plot of land (not really any room for development if replaced