Chablis in France and California in USA are good examples of two very different expressions of the same grape.
Chablis is best known for producing excellent, fresh, and light wines with appealing apple and citrus aromas
California is best known for power, heavy oak, and tropical aromas.
People who like Californian Chardonnay with low acid and high alcohol, may say that a young Chablis is too acidic, and some people may say that they don't like the taste of Chardonnay, because they don't like the taste of oak.
Chardonnay is popular for 3 important reasons:
Chardonnay wines have no sharp edges and no high acid content. The grape produces large crops and it is not picky about soil and climate. The fact that the wines are easy to sell, also contributes to the grape's popularity among the wine producers.
Chardonnay is the most popular white wine grape in the world.
Chardonnay, at the moment, is the second most planted white grape variety after Airen.
Reasons for success: it is a neutral variety, influenced by the place and winemaking technique.