I drove Cadillac's entry-level EV. It hits Caddy's affordability sweet spot.

The Cadillac Optiq is a convincing entry point into Cadillac's EV lineup because it delivers the brand theater. Ben Shimkus/Business Insider I tested the Cadillac Optiq, the cheapest EV in GM's luxury lineup. Its elegant design and supple ride make it properly Caddy-ish. The Optiq isn't the…