This is what people should think about first before discussing an SBS route.
Requirements For A Bus To Be A Good Candidate For SBS:
Isolated.
Has a Major Street It Stays On.
Has Artics.
Has All Day Limited Service.
Has High Ridership.
Has Steady Ridership Along the Line.
I will use the Q44 as an example. The Q44 meets all requirements. It is isolated (Q20 doesn't affect the Q44 that much), stays on one single street, uses artics, has all day limited service, high ridership, and IIRC, a steady amount of ridership along the line.
Now take the Q25.
The Q25 is not isolated. It runs with the Q17, the Q27, and the Q34, which often bunches with a Q25 local sharing the same exact route. They are not scheduled properly and Q25 will have uneven ridership. It does have one major street, which is good. However, it has only rush hour limited, nor does it have artics and doesn't warrent one. The Q25 will often be empty on weekends, but it needs the 10-15 service because by the time it gets to northern Kissena, it will be nearly packed.
Now, if you don't mind, stop saying the Q25 should recieve SBS. Not saying anyone is doing it, but...
It looks like they ignore it. They have to ignore it. Example: Firefighters have to ignore their fear to run into the fire to save people and put the fire out. Otherwise, they aren't doing their job properly.