So Riot's vision for the vision game...

Season 3: 999x on one person, kill whoever has Orcs Season 4: Support can't ward the entire map anymore, so no wards on the map because "durr it's the support's job to ward" Season 5: People are slow to pick up on this, but basically gives everyone a cheap SS and the few games where you can convince people to buy them end with the whole map being lit up like a christmas tree.

So there isn't really a vision game anymore, you just throw yellow wards absolutely everywhere. Just my opinion, this is a good thing. It gives everyone some agency with vision (we've all lost that game because the support was constantly at 0/3 wards placed and enemy Fiddles got a free ride) and you don't have to feel like you're throwing gold around the map anymore. Sure, the game is less complex, but now it's focused more on what Riot wants it to be about (dashing everywhere and blowing people up at the moment, but they might actually get a better focus someday).