People may have gotten bored waiting three and four years between installments and moved onto other things. You have to strike while the iron is hot, something that seemed lost on Paramount and Bad Robot when Star Trek (2009) was a hit.
Very true. They went to all the trouble of rebooting Trek, and did a fair job, but then when 2012 came around, they said, "Oh, I guess we should make another one or something." Both Paramount and CBS don't know what the hell they are doing with Trek. I hope Discovery can right the ship.