@Arne_radelt As far as I can tell, the anti-search arguments sum up to the fact that trolls/harassers use search engines to identify conversations and people who they don't like, and then disrupt those conversations or harass those people. That is a legitimate concern of course, and it may be an accurate description of how people have behaved on Mastodon in the past, but we need to consider what will likely happen if/when Mastodon becomes more popular.
For references, here's a thread describing why the search engine was taken offline:
https://infosec.exchange/@jerry/109311187050279476
Here's some comments from the lead developer:
https://mastodon.social/@Gargron/4947733