It was always stupid do dismiss unions.

The software engineering was in a stupid bubble just waiting to be popped.

But no one cared, since they got paid so much.

they are also pay very high enough to not unionize,

Tech workers are labor aristocracy, so collaboration with capitalists is rampant. Even here on Lemmy, in the tech comms you will find a higher than average rate of capitalist apologism.

But as the market adjusts they will be exploited just like the rest of workforce. This was already the case with some sectors, like videogames, which were more exploited than others. When there is a hefty supply of workers and a stable 5% unemployed, ready to accept any conditions, those $200k+ incomes will be a distant memory.