Sweden became NATO’s newest member on Thursday (7 March 2024), upon depositing its instrument of accession to the North Atlantic Treaty with the Government of the United States in Washington DC. With Sweden’s accession, NATO now counts 32 countries among its members.
Allied guarantees are not something to rely on really. The de-facto participation was something more honest for expectations IMHO.
I don’t think that’s a problem for them, they never turned it into some bureaucratized rudimentary institution in the first place and they had a nice military during the Cold War.