A point: Users may indeed prefer fewer options. This is known. But users will almost always actively eliminate options, reducing the number of available options to a manageable number.
Marketing need take no action - the users and consumers will take care of that for you.
How many Desktop Environments exist - and how many can you name?
Many may list Gnome, XFCE, KDE right off the bat. Others may include LXDE, Budgie and a couple others.
There are over 25 D.E.'s total.
Users reduced the number of choices to about 6 on their own. IF Gnome was replaced by distros, it would fall to the wayside and be eliminated as an option by most users all on their won, with no need for developers or marketers to take any other action.
You can put as many options out there as you want. The users will narrow it down without you having to worry about if there are too many.
It is preferable to have the options and let the users limit it, than to limit it for the users and miss the mark. Gnome prefers to Limit User options, then tell the user to "deal with it."
There are times when you cannot: A restaurant. In cases where the consumer cannot readily eliminate options, they get frustrated by choice paralysis.
In this case it is better to have fewer (But not too few) options.