Absolutely this. While CoC might evolve in the future - destination unknown - we do have a version appealing to different player wishes, it's Pulp Cthulhu. So, with two systems under the current edition, any 8th edition would need to revise both rule systems. That makes it a) somewhat more daunting as a case (capital needed) and b) somewhat less appealing, sine you need to win over two types of fans.
Plus, any future edition needs to come up with ideas for baseline Cthulhu and Pulp. And I'm not seeing anything on the horizon there. This isn't D&D or your cash cow miniature game that redefines itself completely new every five years. No, CoC hasn't changed much since its inception, it always remained a BRP system and there is only so much deviation possible; similar to GURPS or Rolemaster etc.