I've noticed threads talking about Gura and her recent nihilist views, while people are adding that she's testing the waters or attempting to start an internet doomsday cult within her followers.

I thought it was bullshit until I looked into the makings of a cult and saw that Gura falls in a lot of these categories. She's suffering in mind and body, while forming a hatred of people and believes life is just a doomed cycle. The issue of why Gura can't fulfill this properly is because of Cover's restrictions, she can't even get mods for her channel.

So during her talks, she'll suddenly explain that life doesn't matter and nothing matters. It's subtle but it can start rewiring your brain towards vulnerable people. This video explains that cult leaders start with being subtle to rewire you.
https://www.youtube.com/watch?v=NL0uxDscjdo

And a lot of people watching vtubers are looking to escape from desperate or stressful times, so Gura could be using that as a breeding ground for her cult.

Notice this clip, she's telling her audience to remember that "life is subjective", which means that life is just based on ideas and opinions and adds that "Nothing really matters in the end". She almost says it as a cult leader.
https://streamable.com/8v7b98

Then at this clip, when a viewer says that everything is fake, she goes into this trance and says "Yea, nothing is real" and we're just monkeys on a small rock going through space.
https://streamable.com/kyfchz

When looking into the term "Nothing is real", it's an extreme depressive thinking that explains your life is a lie. It's those depressive thoughts that keep you from growing and being productive. So why is Gura truly doing this? It's simple, her life is suffering and wants followers to join her suffering too. This itself could become worse, so we need to be careful or Gura could become an internet Jim Jones cult leader.