The same millennials who collected those cards as kids but didnt hold on to them are now adults with jobs and money to spend, and since social activities, travel, and big-ticket expenses have been largely on pause, it makes sense that some people would invest those excess funds into collectible cardboard
Underworld Breach & Rhystic Study are both stellar cards, but unless your aim is to place them immediately on the battlefield at the cost of potentially not flipping into the actual target, they seem far less appealing
I didnt end up using it in the set because Ravnica was already stuffed to the gills, but I loved the idea
Usually, when supporter cards have an ability that punishes opponents, they don't also come with another ability that rewards players
New MTG Arena codes for packs come out with each new Standard set