You do not need to be on your server for this, this is completely client sided, and can be done on any server. These are your datablocks, it isn't fully accurate, but it can help with how many datablocks it thinks there are in each file. If any of you have any suggestions or something I should add/fix, please put some type of code down (or the idea).
872 are possibly default datablocks. (As said in GUI)
Yes, the GUI is ugly, but if you think you can do better, then make the GUI for this.
I have checked datablock counts on several add-ons, and they are not close to being the amount it actually is, this is just a guess of how much there is.
This has custom keybinds, but only works if you are in a server, unfortunately.
Download
Client_DatablockCheck.zip directly into
Documents\Blockland\Add-ons directory.