Let's hope SHA-256 is still strong enough in the next 20-30 years.
RIPEMD-160 is the one we should hope for. It's 2
96 times
"weaker" than SHA-256.
I agree, but address generation uses SHA-256 and checksum, so i doubt hash collision on RIPEMD-160 is enough to create same address from different key.
But any node that'd do that since 2009, would not follow the correct chain at the moment. The current chain would be considered invalid due to SegWit.
I doubt node from 2009 can even connect to Bitcoin network or other Bitcoin node.