Besides Flash and Toon Boom, what 2D animation software do most major animation studios use? Which ones should I learn?

According to what I read, a majority of the studios out there use either Toon Boom or Flash. What other software do the major studios use? I would like to learn how to use Flash, despite the fact online support for it is coming to an end next year. Toon Boom is rather expensive. I have heard of a program called... show more According to what I read, a majority of the studios out there use either Toon Boom or Flash.

What other software do the major studios use?

I would like to learn how to use Flash, despite the fact online support for it is coming to an end next year.

Toon Boom is rather expensive.

I have heard of a program called OpenToonz but there's only one I have heard of that uses it:

https://lifehacker.com/opentoonz-the-2d-animation-software-used-by-studio-ghi-1767833445

I don't know of any others.

Please help- thank you.
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