I may build a dew collector for the aesthetics of having a complete crafting base with all the workstations. But in practice, a small well in the corner of my crafting base with a couple of campfires dedicated to making water seems just as viable as a few dew collectors and I can have that setup running long before I can get enough fully upgraded dew collectors built.
Now if they changed water collection to only being able to fill one jar at a time at a water source, THEN the dew collector would be the superior way to go. In that case I would start with a well and a fireplace until I could get a fully upgraded dew collector going and then switch over to that for the convenience of no longer having to fill up jars. It would make a nice progression.