Detroit Series 60 white smoke at cold start

12.7 Detroit Series 60 PK engine manufactured June 1998.
Overhauled in August 2019 at my local Freightliner service center. Truck runs great, good mpg and oil analysis. However, it smokes like a freight train during first start when the temps outside are below 32F. There was no smoke whatsoever before this last engine overhaul. Took it 3 or 4 times to different Detroit facilities and they just can't find anything wrong. Last mechanic said that all non-egr 60's do this.
I did lots of research online and it looks like this issue is specific to the engines with 15/1 compression ratio. My engine S/N calls for R23533204 cylinder kit, which is 15/1 cr.

Smoking Detroits & More

Here the guys says that switching to 16.5/1 cr cylinder kits along with 5915 injectors solved the problem.
Detroit Forum - Cylinder Kits for 12.7... 5837 on 2015-04-13

There is also a similar thread here on TT, but no solution to the problem yet.
Detroit series 60 15:1 issues

Found a video on Youtube, same thing white smoke after inframe:

 

I apologize if I wasn't clear enough. Somehow a good portion of my original post got edited and erased. Basically my main question/concern was whether it is ok to run the truck like this and not do anything. I am a kind of lost right now. Detroit shops are saying everything is ok, while my local mechanic is trying to convince me for another overhaul. I am actually fine with white smoke at startup as long as I can get another one million of trouble free miles out of this engine. I can't afford to do rebuilds every 6 months. Thats why I am here today, asking these questions. I know for a fact, there are lots of people with similar "problem" on this forum and I was hoping that they would share their experience.

 

Well, there are lots of other reasons for this besides just excessive smoke. Like huge oil consumption, bad oil analysis, 20 year old truck with 1,4 million miles...

 

Thank you, sir.
Yeah, I've read about low-nox ECM flash causing this too. However, some people reported that their ecm's never been touched and truck still smoked. So I am a bit skeptical on that. Still going to send it in for a software modification sometime next week.

I just wanted to make sure that this kind of cold startup behavior is not harmful for my engine in the long term.