I don't think this is true at all. For several different reasons:
First, "the right approach" to building a software program is wildly unspecified: it could refer to the UI/UX aspects and/or the internal design, and these both have dramatic impacts on long term evolution.
Second: the "right approach" for "making music" in the early days covered things as distinct as MIDI sequencers, trackers and early ProTools. It was far from obvious whether all 3 would continue to exist or some hybrid would become dominant (that's actually what happened - early ProTools did not do MIDI; the eventually archetype for DAWs turned out to be a blend of ProTools and MIDI sequencers, and trackers were discarded).
Third: As I alluded to in my comment here about user groups, the right approach is going to differ for different workflows and use cases. FL Studio is not used by many audio mastering engineers; ProTools is not the choice of beat producers.
Fourth: the goalposts keep moving with increasing compute power. The current idea of infinitely elastic audio that has become common among the most popular DAWs would have been unachievable in the early 2000s. Network bandwidth may have a similar impact.
Fifth: the right approach (especially visible today) for some people who are generally "in DAW space" isn't a DAW at all, but hardware designs that bypass most of the functionality associated with traditional DAW design. The Elektron and similar h/w sequencers of the last 5 years are in some senses closer to plugins than they are to DAWs.
Sixth: plugins - the ones associated with compositional elements (you could say sequencers but it goes beyond that) - have long been where the innovation has been taking place. These have evolved quite differently and more diversely than the DAWs that host them. For many users, plugins are the real workhorses and the DAWs are just the scaffolding around that. It would be hard to take a look at compositional plugins and conclude that the "right approach" emerged early.