It is a common here for people to say "Just fix some bugs and make triplets work -- I don't need a full function notation system", as if those are the only two choices (support for triplets versus full-fledged notation.)
The world is moving. DAWs themselves are the major convergence of sequencers and audio recording. It is perfectly natural -- and probably inevitable that this convergence will continue to incorporate notation.
There is a huge gap between what SONAR does today and what a full-function notation system does today. For example, I don't see where SONAR even supports something basic like enharmonic note spelling. You can't do most lead sheets without that.
One thing we are seeing now with Dorico and Notion is for the MIDI and notation to respect the fact that the notated note begin and end may not match the way we want the MIDI to play. With both Notion and Dorico, when in MIDI view (PRV), you can see BOTH the notated duration and the MIDI duration, and minor changes to the MIDI don't necessarily change the notation.
IMHO, SONAR must advance in this area, even if there is no intention to ever have a full-function notation system. The world is moving on.