I recall someone once remarking that it was unfortunate that the only thing 20th and 21st century architects copied from the Old Course was the total number of holes. While that is rather overstated, there is a point and valid question whether the 18 hole standard has been a consistently good thing for the game over the past century or more that this has been the general rule.
I thought about this last night on a Facebook post where Melvyn Morrow posted an 1890 drawing of the 16 hole course that Old Tom Morris laid out at Muirfield. An accompanying article stated that the course was designed to be easily expanded to 18 holes (which it was by the time it opened for play) which begged the question, why design 16 holes in the first place?
Someone subsequently commented that they felt this was still a time period where the idea of an 18 hole standard was only then becoming the norm and that perhaps Old Tom simply laid out the number of holes that he thought best fit the property.
Given removal of any preconceived limitations on the architect to squeeze exactly 18 holes out of any given property, would our courses be better or worse? Haven't we all seen courses where 18 holes are literally shoe-horned in, where perhaps a promising native site with good landforms wasn't able to be utlized well because the results needed to be constricted to fit 18 holes? Indeed, we often consider it a great feat when an architect is able to fit in 18 good holes on tight acreage.
But what if we had 10 hole course, or 14 hole courses, or 23 hole courses? Would the game be better or worse?