Up to Odoo 10, I used Quants fields inventory_value, cost in some of my reports to calculate purchase cost, etc.... and also I used quants relation to moves in some cases. Now as I started working with Odoo 12 I see that there are no relations from stock.quant to stock.move and stock_quant_move_rel table is gone. 

As I can see, now I can not even check inventory value in Odoo 12?

So maybe can someone explain these changes that were made, and how is workflow is changed, because I'm a little bit lost now.