>I see these posts, and my gut feeling is that Mullvad is probably fairly trustworthy at this moment in time, but the more word of their service spreads the more likely I would assume it is that they get approached by the type of government representatives you don’t say no to.
AFAIK (IANAL etc.) for that to happen several changes to Swedish laws would be required. And the follow up question would be what those demands possibly would be? And of course Mullvad's technical ability to comply?
For some comparison, you could look at the Swedish ISP Bahnhof, which quite publicly fights against the Swedish implementation of the data retention and requests by Swedish authorities. Repeatedly getting Sweden slapped by the EG court. (Which could also be compared with how Signal responds to requests for information about their users which they don't collect.)
There are (again AFAIK, IANAL) no NSL like laws in Sweden.