It's not surprising it's mostly techy people here... Lemmy is still very rough around the edges, and techies tend to have higher tolerance for that... they also are more likely to be committed to open standards, so will stick it out even if there are some negatives compared to Reddit.
I don't really feel like it's more negative than it was.... the honeymoon of Reddit migration is over... it's a long haul, it'll take years for Lemmy to be something like Reddit was at its peak. But I think there's a good chance it'll happen... commercial social media is only going to get worse from here on in