This is the new Ground Unit Training tab. While the layout is a little different, the main change is that units can be named before the task is created and renamed while the task is in progress. Also, low tech units will no longer be displayed as an option once mobile infantry has been researched.
Can we at least be allowed to build cadres directly? Or be able to convert existing TN units to cadres?
I still personally use low-tech units even after trans-newtonian ones are discovered, because they allow me to build the first few of a newly researched unit more quickly, and allow me to forego a lot of the production time and the decision of the type of a unit to a future date, when I'll need them.
Might also be worth making a cadre the size of a Marine Company for easy transport too.
Would be unfortunate to no longer be able to utilize cadres, honestly
If neither is considered, I'll probably just do Conventional Start games and make more low tech ground units than I'll ever need before researching TN units, I guess.