What is said there is logical, but it is impractical. Society has far too much invested in AC transmission systems (including those wires already installed in buildings) and consuming devices to expect even a small switchover to DC for the vast majority of applications. In Tesla's (and Edison's) day DC was impractical, because there was no efficient, reliable way to convert low-voltage DC to high-voltage, and back. (motor-generator sets were the closest to that.)
In the 1930s, the provision of power to remote areas was not thought to be economically feasible. A 2300 volt distribution system was then used in cities. This relatively low voltage could only be carried about 4 miles before the voltage drop became unacceptable.
REA cooperatives used a 6900 volt distribution network, which could support much longer runs (up to about 40 miles). Despite requiring more expensive transformers at each home, the overall system cost was manageable. [Citation needed]" (<< Not gonna find verification, therefore "Fail" -Rr)
Wiring was performed using type NM (nonmetallic) sheathed cable, insulated with asbestos-reinforced rubber covered with jute and tar.
In contrast, the AC transformer was very simple, reliable (no moving parts), and eventually could be built to step up to 760 KV (and perhaps higher), enabling transmission of many hundreds of miles, and then down to 240 VAC, split to 120 VAC. That's why Tesla was right, and Edison was wrong. Edison could never have wired the country with any realistic DC system.
Today, converting DC to DC is far easier, at least for low voltages, see the large set of chips made by Maxim. https://www.maximintegrated.com/en/products/power/switching-regulators.html
But it is virtually as easy to convert rectified AC to low-voltage DC, with these same kinds of chips. So there is very little reason to abandon the modern AC distribution system. Even a local solar array generates a varying voltage that will have to be switched to a specific DC voltage to charge batteries, which is easy to do. And if you hope to sell your excess of power to the grid, it will have to be converted to AC anyway.
Jim