Sustained gains in the tech sector will depend on artificial intelligence investments paying off. The current technology sector rally has been largely driven by Apple, Microsoft, and the semiconductor industry. Broadly speaking, the software industry has been lagging behind. However, Adobe's (ADBE 0.68%) latest quarterly results show that its artificial intelligence (AI) investments are paying off. Meanwhile, Broadcom (AVGO -1.44%) is on track to generate over $50 billion in revenue this fiscal year -- a mi ...