When/why/how did Mas Tacos become the source of so much disdain? Few years ago, I stopped going because the line was so long. Did they change their food? Did their vibe get bad?

Shortly after Mas Tacos opened, I made a few treks over there. The line was tremendous, the service somewhat arrogant, but the food was great. Maybe it's the competition in Nashville for street tacos has caught up, but there's definitely an anti-Mas Tacos vibe now. What the heck?

(edit) It seems that the shift is increased competition. A lot more options than previously.