What's the difference between 'sona ni' and 'soko made' ?
Are they interchangeable ?
Konnichi wa minasan !As the title says , i'm having a hard time figuring out the nuance between 'sona ni' and 'soko made'.From what i understand , they both have the meaning of 'so much'.Is this correct ?Kansha shimasu :)

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They are interchangeable, but to me, そこまで is stronger than そんなに. I would translate "そんなに"  into English as "so much" or "like that", and "そこまで" would be "go that far".

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I think your understanding is correct. In many cases they are interchangeable.  But they are not completely the same. And both そんなに and そこまで usually follow negative meaning.

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!