Here are some good reasons why the Ford Model T was a great car for its time:
Price: The Model T was not the first car to be the most affordable, but it was priced in the same ballpark as its closest contemporary, the horse. By continually driving down the price of his cars, using optimization techniques like the application of the assembly line in 1913, Ford made more cars than anyone else in his day. When he instituted the 5 dollar a day wage for his workers he was not only an instant folk hero but he gave every worker the financial means to buy his cars.
Reliability: Easier to get out of the barn and get going than hooking up the team to the wagon, and the planetary transmission with a flywheel magneto and Ford’s use of vanadium steel for strength made the car reliable and easy to operate. When it did need repair, the revolutionary separate head and block design pioneered by Ford and the simplicity of the overall design made maintenance simpler, faster and ultimately more affordable. A few simple tools can keep a Ford Model T running for years.
Perpetual Integration: The Ford Model T was easy to modify and whole industries of after market modifications were introduced to transform them into race cars, utility vehicles, sawmills and even snowmobiles. Modifications to Model T cars are still commonplace today, making it an icon of the last century and of the modern era.