SAN ANTONIO, Texas — Jeep, a brand that builds nothing but more than capable SUVs, is absolutely booming. Overall sales are up for the seventh year in a row, including three straight years of one million vehicles sold, with a record breaking 1.4 million in 2016. It doesn’t hurt that American car buyers have made a dramatic shift from traditional family sedans to utility vehicles; the hottest segments are compact and subcompact crossovers.