[gamblor956]

And it's basically impossible for other companies to manage Unity SDKs with a ground that moves that much.

Many successful video game companies use Unity to make their games. It's basically impossible to use except compared to the alternatives, which are just as impossible or more so.

[jayd16]

It's pretty impossible to make an sdk or plugin that's runs on every version of Unity. I haven't seen it, anyway.

Studios have the same issue. They pick a version to ship with and work around whatever known bugs there are. Upgrading is a huge event and it's never painless.

[seba_dos1]

Only because they keep it on the version of the engine they started on. Just ask any game developer using Unity about whether they tried to update the engine mid-project and how that went if they did ;p

[Reedx]

Well, there's also the option of making your own engine. Which many game companies do, especially in the AAA space.