Sonar's ability to import track templates and build a song layout this way has always been my most beloved feature... start off with a favorite set of Kontakt patches, all nicely routed, add a vocals template, then bring in some orchestral templates... I've worked soooo long this way, being able to set up submixes, effects routings, etc... and build them from ground up as I create new things all the time... I will miss this HUGELY!  
 
Cubase don't do it... Presonus doesn't... they're all limited to "song" templates and I can't add new sub templates like another instance of Kontakt, all set up with routings/instruments, in a second...  I'm amazed this isn't possible in these other daws and that people haven't realized/talked about it's power/time saving utility...
 
Anyone have some ideas???  Any other DAW out there?  I now own Cubase 9.5 and Studio One 3 and both suck in this regard...

I agree, this is a very powerful feature in Sonar. I never realized most other daws lack this feature. Now I understand why some big producers including Hanz Zimmer and co's use a go to song/ project template with 400+ instrument tracks preloaded. It all looks funny before sonar's track template feature. Remember sonar not just allows to save track templates for single track but rather multiple tracks at once along with all tweaks, fx, routing, busses folders. I really cant live without this feature. Will be good to know if any of the top daw's have it. I guess logic has something similar but not sure if multiple tracks can be saved as template. 

Reaper does :-) https://www.youtube.com/watch?v=EXvjh7FASMo

Cubase has Track Presets and FX-Chains.

Try this:
 
https://www.steinberg.net.../viewtopic.php?t=63245

Reaper is the best as substitute to SONAR IMO.
It is cheap, customizable to death and does quite a few things that overpriced DAW don't

in PT you can import session data. Here you can choose to import tracks, aux's plugings (what ever you want) So if you make a "template" session with all your tracks, softsynths and what ever you can import from that in to a new session....

Because we need 10 laptops for recording tapes and vinyl we need project templates.
We found out that Cubase can very easy save and load complete project templates, track templates and FX templates. If you don't need in place offline rendering, Cubas Elements (99.-) can do this. Cubase is more suitable for comple audio editing - for example if you need batch numbering thousends of clips and batch export.
 

Cubase sucks
 

Even though we didn't get this until X3, it is amazing how reliant I became on track templates. I am hoping that will become available in Studio One soon, but will see. It is the most missed feature for me as well.

It also shoots some freaky routings in the butt, since project templates must be used first, then tailored each time.