Soft is pretty (and beats the hell out of pointy and prickly and sticky), but soft can't hold heavy ornaments- which is a deal breaker to most people.
It's one of the downsides of Lelands and other fast growing breeds, meaning ~3 years to mature instead of 5-6.
Timber has similar issues- fast growth is softer and weaker than old growth.
That said, there are some amazing and beautiful types of xmas trees being bred these days, but when it comes to holiday sentiment, different doesn't always sell.
Which sucks to find out after 6 years of invested time, labor, and cash. (Likely with 5 younger years of crop already planted, growing, and committed to.)