My needs are very simple - can I start using CI4?

You should know, though, that if you do build on CI4, it's always possible we'll refactor something that will break your site and cause you extra work, so there's that. And security issues that might be found, etc. So - it's possible, but can't really recommend it.

I've extended (or more, hacked) CI3 somewhat for our company platform and was positively surprised that most random edge cases have made it to CI4, sometimes very close to my own implementation - so to say that I'm excited to have a lot of it come straight out of the box is understatement.

Nice! That makes me happy to hear that. I'm curious what edge cases we helped solve, though?

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