Modern militaries are rapidly transforming into what was science fiction, say, 50 years ago: almost exclusively remote-controlled robots and primarily (or even exclusively) autonomous robots.
If you call small, unmanned, armored vehicles "tanks" you are misleading people.
In modern militaries, whether it be surface ships, submarines, airplanes, tanks, etc.... within another few decades, people almost certainly won't be inside of them. People will control them remotely and/or algorithms/artificial intelligence will control them.
What we are seeing in Ukraine is Russia and NATO disposing obsolete military weapons in a disgusting farce of a war. Washington and Moscow should have divided up Ukraine like they did much of Europe in the waning days of World War II.
There was no need for a single bullet to be fired, let alone mortars and missiles. Washington antagonized Moscow ceaselessly. Eventually, Moscow took the bait. It's tragedy that could have, and should have been avoided.
Nonetheless, just because these days you see men in tanks fighting in Ukraine on your phone or laptop, don't think that "Tanks are still relevant in modern warfare!" They aren't. Tanks, by which I mean large vehicles with people inside of them, are obsolete in modern warfare.
People who claim tanks are still viable in modern warfare are either fools, liars, or manipulative purveyors of falsehoods who enjoy twisting words by referring to small, unmanned robots as "tanks."
The Economist.com is yet another legacy media property that regularly engages in obvious yellow journalism in a doomed struggle to remain profitable. Articles with headlines like, "Does the Tank Have a Future?" are clickbait.
I didn't take the bait; I didn't read the article. Why should I have? A better article would have been, "Does Economist.com Have a Future?"