Instagram was initially super awesome. You could look up some totally obscure hashtag about, say, #68040 and find a ton of photos relating to 68040-based computers. Every image with the hashtag was actually directly related. Maybe you still "can" look up such hashtags, but the platform became so overrun with what I would call "noise" (and then got bought by Facebook), so I haven't logged in in years and refuse to now... What I mean by "noise" is, I'd search some seemingly-specific topic only to find that it has of course been appropriated by some pop culture thing that is completely irrelevant to the previously-unique term. I really just want to see stuff related to my totally niche interests, and it started to become impossible to actually do that. Also, any actual on-topic posts became fewer and fewer, I suppose as people like me realized it wasn't the platform for them.