I look at Sonar and the Pro channel the same way I do my old analog desk/board.
Every desk strip has unique sound characteristics. I wouldn't expect to use a channel EQ strip on my analog desk.
I would use the onboard EQ and manipulate its tonal quality's to my satisfaction.
Its a little different in this digital age we live in. back in the day you could see the whole desk in front of you.
Where as now, you need to press a button to see a hidden view, or scroll to see a hidden view.
The Pro channel can easily be collapsed or hidden, as well can also be shut off (Its default state) so its really not using any CPU/resources. I find the quality of the modules to be very adequate for some tracks.
I don't use the Compression for every track. but if were left with no choice but to use the PC on every track.
I would be able to simulate with good quality, a classic analog desk.