Hornet3d
Wise
lol...I know what you mean. I checked in my Daz Install Manager yesterday and saw I have over 6440 items from Daz, that's not counting all my other content from other sites. More recently I buy more from here and Rendo than Daz for a variety of reasons. I do like Genesis 3 but the characters I find interesting are more often on Rendo then Daz.
I used to have multiple runtimes but since Categories I haven't needed to. The thing I like is that I can have everything for the character in the one place.
So Dawn is Dawn/characters, clothes, poses, hair and all the materials are inside the outfit folders. So much easier than the old days when I had to go to characters get the clothing, then to poses and find the mats etc..
If I have money to spend I come here first but Petipet and DzFire do some great sci-fi scenes over at Daz and they tend to get me reaching for my wallet. Rendo not so much but I think some of Fabiana's items that are on sale might make it into my basket before the sale ends.
I have no idea just how many items I have but I would guess it is less than your Daz total and that would be from all sites for me. I do know I have my working runtimes on a 250G SSD and I will need to buy a bigger one probably before the end of the year. I then have another 50g or so in archived runtimes that contain stuff for V3 and the like which I might use but not on a daily basis so that is sat on a conventions hard drive.