Algorand 3.0 questions (re SDKs and indexer v2 APIs)

Will the imminent Algorand 3.0 affect the indexer API (blocks, etc…) and the various SDKs (Python, Java, Javascript)?

I have not yet had time to look too much into it, it seems to mostly affect AVM and opcodes, etc… but I was wondering about “inner transactions” and tx counter, etc… I don’t seem to see new indexer API and new SDKs, but at the same time, I read comments like:

"This only changes the blocks, so there is still a lot of work to do so that external APIs see things properly. "

Could anyone help me understand?