This isn't actually news. In the security and threat intelligence community, this particular vulnerability has been known about for 2 years. It isn't the first time a theoretical vulnerability has been studied and reported on, even if there are no known vectors to exploit it. The common practice is for researchers to identify the threat, and report it to the specific manufacturer or vendors for mitigation. In this case Apple, who don't report what they're doing about it, but have generally been very responsive to the threat intelligence community in these circumstances.
You could take a look at
https://arstechnica.com/information...-six-generations-of-intel-pc-and-server-cpus/ for one example of a previous threat, and in fact even that isn't the first time Intel CPUs have been reported to have intrinsic security holes. The original of its type (
https://arstechnica.com/gadgets/201...odern-processor-has-unfixable-security-flaws/) caused havoc in corporate networks and huge potential data losses in 2018, and is still being exploited now.
The sad fact is that no data on any device which has access upstream to the internet, even if indirectly, is truly secure. It takes constant work by many thousands of information security specialists to
try and keep data safe, but it only takes one single 'bad guy' to get in - often by pure luck.
It isn't that these attack vectors aren't a big deal, but they are inevitable. Sadly, it isn't until you've built an actual 'product' that you can find all the ways in or out of it. Simulations only get you so far.