It seems like it hasn't "bloomed" into something resembling the scale of the world wars yet. Ukraine is massive though, has room to contain a lot of warfare, but as of now it's still mostly contained.
I'm sure Putin would rather escalate than go back, though.
If this war leaves Ukraine, I'm gonna consider my days numbered. If it leaves Ukraine we'll probably have less than a decade left, and those years won't be good years.
Putin is so fucked in the head for wanting to conquer so bad that he's willing to do this, Russian people are equally fucked in the head for supporting it.