I check the revised calculations for the top quark and Higgs mass measurements every few years, as the accuracy increases it seems more and more that the universe metastable, though last I checked stable conditions were not eliminated.
The vacuum can only expand at the speed of light.
Only a portion of the universe would be destroyed. The universe would still be unaffected because galaxies located further than 4,200 megaparsecs (13 billion light-years) away from each other are moving away from each other faster than the speed of light while the vacuum decay cannot expand faster than the speed of light.
For the most part continued measurements have increased the accuracy of the Higgs boson which is the horizontal aspect of the oval, but there have been improvements in the models and methods that have assisted in narrowing the top quark as wel.
While there might be better sources now, when I was following it more often, the authors of this paper [2] were the best source of tracking at least the top quark as that seemed to be a special topic of research for them.
[0] https://en.wikipedia.org/wiki/File:Higgs-Mass-MetaStability....
[1] https://en.wikipedia.org/wiki/File:Higgs_FalseVacuum2018.jpg