A family of Microsoft relational database management systems designed for ease of use.
Why take out a perfectly good feature like that?
Simple, ....
$$$ MONEY*$$$*
It is a return to the "bad-old days" when different "versions", aka "price-points", of the Office applications had different feature subsets, ie "standard" vs "Professional" versions (see Visio!)
The bean-counters in accounting and marketing got together and figured out that they could "force" users to pay more to get the feature back in the only expensive package it is now offered.