Community Engagement: Joining forces with friends or fellow players can lead to memorable gaming sessions and foster a sense of community
As you pointed out, the difference between Pokmon EX and Pokmon GX is that the former ones are always Basic whereas the latter ones are always the stage they are supposed to be [1] (except for Tag Team GX cards which are also always Basic)
You want to figure out and develop a mental image of what you want your sleeve to look like
Plus, cascade doesnt care if you resolved the 7+ mana spell or not, so even if the spell is countered, youll get the two cascade triggers
The Topsun set retained the original 1995 copyright date, making it seem like it predates the games
Looking at the current metagame, it seems that Modern is moving away from broadly useful cards, and leaning into sideboard haymakers