Has anyone already switched their kids to online school? Do you regret it? Has your child's academic…

I don't regret it. It's hard to say about his academic performance, he always studied well. It's become calmer and more comfortable for everyone. He studies at his own pace.

We haven't regretted it at all.
Yes, it's gotten better, much better, BUT! If the child doesn't care about studying and just wants to get it over with, just do the homework, then online learning isn't for them.
We have our own learning schedule: the child studies what's needed for their future profession/university admission and education, plus what we consider mandatory (history, literature, etc.).
And there are tons of pros:
Own schedule
No several subjects (drawing, music, PE, etc. — only superficial study).
No need to travel anywhere
No need to wake up early in the morning
No need to buy uniforms, etc.
Lectures can be rewatched many times
Mentors will explain — break down any confusing topic.
Etc., etc.

Olya School is crazy here. They don't teach anything. What school are you attending? And if you don't want to name the school, what format did you choose and how much does it cost?