I think it depends on your definition of “fine.” No one will die or even be particularly inconvenienced from not being able to play a particular game for a couple of hours at the same time every week. Steam alone has hundreds of thousands of other games that ARE available at that time.
Reported tests are almost completely gone compared to past waves, so reported positives will likewise be almost gone. Wastewater data in the US shows a very clear increase, with levels currently at least half of the peak of the previous two waves.
Tested cases are barely up because testing is at a small fraction of what it was even a year ago. Wastewater data, hospitalization rates, and deaths are all rising. Wastewater levels are currently about half of most previous peaks(https://biobot.io/data/covid-19), and that data lags by at least a few weeks.
Regarding masking in cars - best practice for good mask wearing is to put it on, ensure a good fit, then leave it on until you're done with it. If someone is running errands, it's better to just put leave it on instead of donning and doffing it repeatedly, making it more likely to cross contaminate or ruin the fit.
There is immunity in the sense of "the body is able to mount an immune response due to previous exposure." Early claims of immunity to infection didn't pan out, especially post-Delta. There are benefits to having immunity, but I believe they are often overstated. (I say this as someone who is currently wearing an N95 respirator around others 100% of the time, including around my partner and family).
It's on track to kill 200 thousand people this year in the United States alone. It's likely that millions will die this year worldwide, and tens of millions will become disabled to some extent by long covid. The usual response is "this is a small number compared to the total population," but it's still millions upon millions of people. Health care systems around the world are already stretched thin, and the increased burden caused by covid will only make things worse.
I think the explosions and fires would cause negligible deaths. The thing I’m worried about is starvation. If the grid goes down on large parts of the world for more than a few days, the cascading effect would probably mean most people just starve to death within a month. We have extremely fragile food creation and distribution systems.