I'm as big a SQL stan as the next person and I'm also very skeptical anytime anyone says that SQL needs to be replaced.
At the same time, it's challenging that SQL cannot be iteratively improved and experimented upon.
IMHO, PRQL is a reasonable approach to extending SQL without replacing SQL.
But what I'd love to see is projects like Google's zeta-sql [1] and Substrait [2] get more traction. It would provide a more stable, standardized foundation upon which SQL could be improved, which would make the case for "SQL forever" even more strong.
I've blogged about this before [3].
[1]: https://github.com/google/googlesql [2]: https://substrait.io/ [3]: https://roundup.getdbt.com/p/problem-exists-between-database...