>Unless your website is written in Russian or Chinese, you probably don't get any traffic from them. They mostly just waste bandwidth and consume resources.
THIS is evil. You could use this argument for banning any new search engine.
The problem is that both Yandex and Baidu are rather poorly behaved - they hit your website way too fast, downloading large bandwidth files in quick succession. That's actually what led me to the bad-bot-blocker project in the first place. Baidu has also been accused of not respecting robots.txt though I have not personally observed that.
This is the reason they're blocked, not because they're new or non-English.
What "new search engine" has actually generated actual revenue for any webmaster in the past ten years? You could argue DDG but that's the only one I can think of.
THIS is evil. You could use this argument for banning any new search engine.