I think that if something boosts your speed in getting to final product, it’s definetely a good something.
I found myself using Sass, rather than normal CSS, because not only it makes it faster to write CSS in case of nested elements, but it’s also more manageable on the long run.
I agree on templates being useful, but honestly I don’t use them all of the times.
Some of the times (like for personal project where there is no deadline factor) I want to have the challange of creating the skeleton by myself.
Also in most code editors/IDE there are plugins you can install to expand a typed word into an already-made code template.
It’s very useful when you are dealing with Bootstrap’s card, carousel, etc or if you find yourself writing down lots of repeated code.