This is CHIPS and IRA at work, largely. The government decided we needed more manufacturing, paid people money to do that, and... now we have more factories and manufacturing jobs. People get all balled up over policy decisions like this because of politics, but the truth is that Keynesian economics is pretty simple to understand and it works exactly the way you'd expect it to work.
That's what the article says, but the chart in the article casts quite a bit of doubt on that explanation (it's obviously an accelerator). Indeed, two paragraphs later, the article states "Census Bureau data reveals manufacturing construction spending has escalated from January 2020 until April 2023 in every region except New England and the Mid Atlantic."
If you assume that people make plans before spending a lot of money, you would think that the tipping point was back in 2019 or so. In fact, I know people that make machines that are used to make and outfit factories and they've been running at capacity for a long time. You might think it's crazy looking at that chart, but factory construction in the USA is currently constrained by availability of parts and people. People want to spend more than they're currently spending...