Qwant at its launch was immensely performant and they had the beautiful “lite.qwant.com” same as DuckDuckGo lite, but eventually they deprecated that and bloated the homepage.
Ecosia was also less cluttered and performant, now it feels like looking at a children’s book painting website or something and has more ads.
What I think will eventually happen is, both will collaborate and build the next generation of previous Yahoo! and fail.