

My gaming machine is still using DDR3. Never really saw a reason to upgrade, games mostly became more demanding in the graphics-sector, even the first-gen i5 is doing reasonably well with most games, even newer ones. And if not, I blame badly optimized games.
RAM speed usually is the last thing you have to worry about in games.

You don’t need AI for that. Automated phone answering systems do exist, and can redirect people.