I've been somewhat getting acquainted with veganism since 2017, tried it for a few months in 2018 and quit because I thought that I wouldn't make a difference. I wasn't aware of the exploding growth in the number of vegans worldwide and all the compelling evidence regarding cruelty, health, environment, etc.
At some point, I realized the cognitive dissonance in myself for being an animal friend but having another on my plate. After extensive research I realized there was not a single compelling argument against it. The last time I ate meat was at christmas 2018 and I went fully vegan around february 2019.