This answer is uttered by someone who actually never used social media regularly & committedly, until now as #NostrOnly.
I wasn't used to this style of connecting with people, so I expressed quite a few posts with using this technique, to familiarise myself with it.
One cool thing I found out doing that, is that it is so extremely easy to connect with people outside of your usual circle of peers, once you start using general hashtags, like #askNostr, for example.
For "communities" you have to join them & if they have custom names, you also have to find them first.
The hurdle is much bigger. While using a hashtag is so damn simple & quick.
That said, the issue to me with cluttering text is not i line hashtags, where they naturally make sense, but all those attention seeking npubs, who append like 30 hashtags to the end of their note. This is unnecessary & I would recommend against doing that.
However, inline #Hashtag s make sense to me, now.