Two years is a very long development cycle.

Like all tech, things go out of date pretty quick. Suggestions made 2 years ago will likely have little relevance now.

Even two years ago, V4 sales were slowing down and genesis sales are climbing. Now with G2 figures, the sales on G2 stuff is 1000 times better than sales on V4 stuff. So to remain viable in the marketplace, you really have to keep up with the trends.