I canceled my NY Times subscription last year, but from what is readable outside the paywall, this appears to be discussing DHL Express, the international shipping company, not national postal carriers. DHL did something similar in the spring, when the administration removed the "expedited clearance" (or something similarly named) option for items valued under $2500 (or was it $2000?) IIRC, the administration soon caved and restored that option, and DHL resumed shipments. I think expedited clearance allows the carrier to perform inspections on behalf of customs, so the items never leave DHL's possession.
Unless/until FedEx and UPS announce similar policies, it should still be possible to ship from abroad into the US. I think both of those carriers have IT infrastructures that can better cope with the additional work that will arise from the termination of
de minimus exemptions. But stuff certainly isn't going to get cheaper.
To me, the really interesting question is how national postal carriers respond. Judging from separate comments above, the German Post (also named DHL but I think a different organization than DHL Express) and Royal Mail, and maybe others? have suspended shipments. I would have thought that their responsibility was only to land the shipment in the US and hand it over to USPS, and that USPS was responsible for navigating US Customs, collecting tariffs, etc. But the correct answer to "what do I know?" is "not much."
Maybe all of this is discussed in The NY Times article. If someone has a gift link, perhaps they can share it.
Edit to add: I see that
@gatorcpa posted a Bloomberg link with lots of good information. Thanks