I mean, theoretically I could put hashtags right here and now. #seewhatimean? And if you copied and pasted them into the search bar you could theoretically use them to find other content that also used the same ones. But the whole entire point is to allow the submitter to make their content easier to link up with other content, so that you can simply see something, click it, and instantly find other similar things? It's really not hard at all, and like PieFed *already* has it. It sounds like the Lemmy devs simply don't care about that style, hence it won't be done. Unless someone wants to donate their time to make it happen I suppose?