The article lists Thailand, Indonesia, and Malaysia. Thailand is doing very well. Malaysia has done ok. Indonesia has ups and downs, but is better than you might think. And don't forget that China has been very successful building societal wealth amid corruption so deep it is almost official. The model has other successes.
But the one thing South Korea had over all of them: the USA. The ROK was a US garrison state, and a military dictatorship well into the 80s. They were a major staging ground and supplier for the Vietnam war, and billions of dollars flowed through companies like Hyundai, growing them into industrial giants. The USA was even directly paying ROK soldiers who participated in Vietnam. The USA was eager to maintain a toe-hold on the Asian continent, and provided active support. When the "Arsenal of Democracy" needs a local supplier, you can create a lot of infrastructure.
The support from the USA/NATO also included friendly trade deals despite the political cost domestically -- remember Toyota and Hyundai gutting the fat and lazy big-3 in the 80s? The cold-warriors wanted to showcase the capitalist power of wealth creation for the region to emulate, in contrast to the creeping communism of the post-war, anti-colonial era. The USA was much more invested in the success of ROK than the average independent Asian country.
As for Indonesia, geography is much of it. It is the 5th most populous country in the world, over thousands (and thousands!) of islands, speaking hundreds of languages. Just transportation and coordination costs can explain much of their troubles industrializing. Also note that they were never occupied by the Americans during WWII. Instead, they were forced to fight a bloody independence fight against the Netherlands which didn't make any friends in NATO. They then dabbled with the Soviets which certainly didn't help them long term economically, and it meant that they were frozen out of the post-war alliances. The USA was happy to leave a brutal dictator in place as long as Suharto kept the communists out. Social and industrial development of the bulk of Indonesia served no cold-war aims.
- The Vietnam War and the ‘Miracle of East Asia’ - https://instruct.uwo.ca/economics/317b-570/keunhoparkclayton...