"Intel is one of TSMC’s biggest customers and has been for decades. They have many products at TSMC over the years, mainly chipsets and other things on ‘older’ processes.
Some of this was due to capacity, some of it was due to Intel’s process lead, and some of it was because TSMC had IP or a process tuned for something Intel didn’t, think RF for starters. Intel also used outsourcing as a weapon, in the 40nm days they would buy wafer starts and use them for things they didn’t strictly need to in order to deprive the competition of cutting edge, for them, silicon."
What a shitty company. I'm glad they are having troubles now