Equinix is a more stable play for long-term income investors.Applied Digital (APLD +14.07%) has been one of the market's hottest AI stocks. The data center operator's stock surged nearly 540% over the past 12 months, impressing bulls with rapid growth, new leases, and the planned spin-off of its cloud business.On the surface, Applied Digital seems like a great AI play. It builds and buys big data centers, powers them up, and leases them to companies that install their own servers. It even launched its own c ...