Are games snowballing now more than before? Or has the play-style meta changed a little?

So many games go like this - Some lane gets an early advantage, tower in that lane falls. The winning laner quickly groups with other team-mates/jungler and kills towers in other lanes. So its 20 mins into the game and one team has no tier 1/2 towers. 6 tower deficit, complete loss of control. GG at 25 mins. Are teams becoming more focused on taking towers early? Or is more snowballing in the game giving the same result?
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