alt Hacker NewsThe answer is so obviously "no" for the general case (making even a tiny dent to streaming/digital) that the article's title amounts to clickbait.
That's regardless of the fact that there has always been a vibrant extremely niche cassete scene, the same way there still are 8-bit home computer fans and clubs.
At best, on top of the above, a tiny additional niche of more mainstream "hipster" artists and fans might release/get cassetes as a statement.
Both numbers summed would still be so small compared to the overall music consumption market/methods that implying any sort of "comeback" is ludicrous.
Indeed, the title is the usual nonsense. Sales within a niche like this will always fluctuate. When someone spots a slight increase, they jump at the chance to wheel out this kind of headline. The article itself doesn't give hard numbers, just says UK sales "reached their highest level since 2003" - meaningless since cassette sales had died long before then. It links to an article that says there were "195,000 units sold last year" - so, next to nothing.
I recall one point around 10-15 years ago, websites were simultaneously proclaiming the death of CDs because sales for the year had just dropped below 100 million, and the revival of vinyl because sales were approaching 1 million in the same timespan. Of course, the takeaway for many young people was that vinyl was outselling CDs.
I'm pretty sure these articles are planted by PR firms working for the music publishers they talk about. There are plenty of people happy to be told what's currently "cool" and they'll obediently go out and buy them.