Converting everything to 1x and hoping it's what people want to buy is foolish, 1x itself is not foolish if it's what you're looking for.

I have a spare parts built Trek MTB with 100mm fork and 1x9 gearing. 40T up front with standard Shimano cassette out back and it's perfect for what I was looking for. Low enough gearing to make it up singletrack climbs, high enough for me to cruise to class the next day. Key word though is enough, it's not the perfect solution, but I like it.