You ask an important question. If Codidact just becomes Stack Exchange Inc. version 2 in several years, we've failed our communities and ourselves. We don't want to go down the path that SE took; we all saw where that led. So we're doing some things differently from the start.
First, Codidact is a not-for-profit venture. We will never get our priorities from stockholders or venture capitalists looking to make a profit. The need to greatly increase their profits is a major cause of the changes SE has been making.
Second, the Codidact platform is open-source. We will be running an instance and welcoming a network of communities, but any community that feels we have lost our way, or just has different goals, can leave at any time, taking not only the content but the software as well. Anybody can set up another instance. On SE, in comparison, while people can take the content, the software itself is proprietary -- so you can't just take your community and set it up easily somewhere else, but you need to get new software first. Because SE's business depends on that proprietary software, they will never change that policy. We are open from the start.
Because we're not bound to people seeking a profit, we are free to be much more community-driven than is possible on SE. Different communities have different needs, at both the software and policy level. SE in recent years has been centralizing control, making it harder for communities to do what is best for themselves. Our instance will have some lightweight rules too; for example we don't want to host neo-Nazi groups or 4chan or that sort of thing. But everybody who follows our very basic code of conduct is
welcome. We're not going to micro-manage communities. (We're currently
discussing some small tweaks to that code, but it won't significantly
change from that.)
There are never guarantees in life; it's always possible that something
bad that I can't currently imagine would happen someday. But we're
doing our best to avoid repeating SE's mistakes, and we think being
open, accountable, and free gives us our best shot to do right by the
communities that join us.