Morningstar's Philip Straehl says his firm and investors are reevaluating the tech space as the trade cools. He believes investors can hold tech but believes in diversifying into underappreciated corners of the space and trimming stocks like Micron (MU), SanDisk (SNDK), and other AI memory companies. He labels Mastercard (MA) and Visa (V) as stocks he likes outside of tech due to their massive consumer moats.