This is the fediverse, I recommend finding peace with the fact you’ll run into different customs here.
OP created a microblog post, which means Mastodon is the target audience, not Lemmy. For Mastodon, it’s essential to include mentions, even to the person you’re replying to, because otherwise Mastodon won’t notify the user of the reply.
Since Mastodon is the target audience here, OP probably also expected replies to come from that side of the fediverse, not the threadiverse. Their instance by default doesn’t display your instance’s name next to your name, nor does it display your software there. So they probably weren’t aware the user they were replying to used Lemmy. Hence the mention.
This is the fediverse, I recommend finding peace with the fact you’ll run into different customs here.
OP created a microblog post, which means Mastodon is the target audience, not Lemmy. For Mastodon, it’s essential to include mentions, even to the person you’re replying to, because otherwise Mastodon won’t notify the user of the reply.
Since Mastodon is the target audience here, OP probably also expected replies to come from that side of the fediverse, not the threadiverse. Their instance by default doesn’t display your instance’s name next to your name, nor does it display your software there. So they probably weren’t aware the user they were replying to used Lemmy. Hence the mention.