⚠ Packaging Competition Is More OpenModerate threat

Advanced packaging is a genuine strength, but it is a more contestable arena than leading-edge wafer fabrication. Packaging, while sophisticated and increasingly difficult, does not require the same twenty-billion-dollar leading-edge fabs or the same extreme process learning curve, so the barriers to entry are lower and the field of potential competitors wider. Traditional outsourced assembly and test companies (OSATs), as well as Samsung, Intel, and others, are investing heavily in advanced packaging, and the technology is less exclusively TSMC's than the leading-edge node is. The current bottleneck reflects a capacity shortage more than an insurmountable technology monopoly.

This matters because packaging is where TSMC's control of the AI supply chain is least locked-down. As the whole industry races to add advanced-packaging capacity, TSMC's current chokehold could loosen: more suppliers, more capacity, and customers eager for a second source of packaging to de-risk their AI supply. TSMC's advantage here is real — it leads in the specific technologies AI chips need today and has the tightest integration with leading-edge silicon — but it is less of a moat than the wafer fabrication itself, and more exposed to competition catching up. Packaging deepens TSMC's position while it leads — CoWoS has run effectively sold out through the AI boom¹ — but an investor should weight it as a strong, contested advantage rather than the near-exclusive one the leading-edge fabs represent.