Since now Pega allows you to add a table to define a grid, has anyone faced any issue with backward compatibility of Pega 7.1.x grids when they are updated to Pega 7.3.1? Online help does not show that it is deprecated. Please suggest at the earliest.
Grids are not currently deprecated. I believe the change to "tables" was more of a semantic change more than anything else. But that is my understanding. You shouldn't face any issues if you had a "grid" which is now a "table" after your upgrade. If you do, please report them.