postgresql – Would you recommend to use PL/R in 2021 or is it dead?

And for many years there exists a PostgreSQL extension to use GNU-R directly in the database: https://www.joeconway.com/plr/

Ubuntu packages are also provided and updated for latest PG: https://ubuntuupdates.org/pm/postgresql-13-plr

But it seems to me, that there is no maintenance happening for the extension itself. (Changelog references PG 9.5) Is it dead?

We would love to use PL/R in our PG-databases, but I am afraid that I will depend on an unmaintaned extension then, which is not ment for productive use and it will kick-back in a few years…

Has anyone used PL/R extension with PG for production in the last years? Was your experience good? Are recent versions of GNU-R supported?