I’ve exclusively used Thinkpads with Linux as my daily driver since 20 years now. Programming, office, general tinkering (no graphics-intensive stuff though) - had almost no issues in the whole time.
IMHO for Linux, you really can’t go wrong with any Thinkpad nowadays.
Exactly what I was thinking… They made an effort to not let others operate Signal servers. Now they say that infrastructure costs USD 14M. They could save some of the 14M by allowing people to use their own signal servers.