Lots of Google analytics competitors appeared between 2017 and 2023 due to privacy reasons. And a lot of them started with normal Postgres or MySQL then switched to Clickhouse or simply started with Clickhouse knowing they could scale far better.

At least in terms of capability and reputation it was already well known by 2021 and certainly not legacy or bulky. At least on HN clickhouse is very often submitted and reached front page. Compared to MySQL when I tried multiple times no one is interested.

Edit: On another note Umami is finally supporting Clickhouse! [1], Not sure how they implementing it because it still requires Postgres. But it should hopefully be a lot more scalable.

[1] https://github.com/umami-software/umami/issues/3227