I'm one of those really odd beasts that feels some sort of loyalty to Microsoft, so I started out on Copilot and was very reluctant to try Claude Code. But as soon as I did, I figured out what the hype was about. It's just able to work over larger code bases and over longer time horizons than Copilot. The last time I tried Copilot, just to compare, I noticed that it would make some number of tool calls (not even involving tokens!) and then decide, "Nah, that's too many. We're just not going to do any work for a while." It was bizarre. And sometimes it would decide that a given bog-standard tool call (like read a file or something) needed to get my permission every. single. time. I couldn't do anything to convince it otherwise. I eventually gave up. And since then, we've built all our LLM support infrastructure around Claude Code, so it would be painful to go back to anything else.