There's a reason POCs matter right? Why you feel comfortable (even though I don't agree) saying multi-threaded Go doesn't have a memory safety problem and yet you wouldn't feel comfortable making the same claim for C++.
Granted, a 2^32 block limit is pretty severe by modern standards.
The 64 bit block size in 3DES (and Blowfish and IDEA) limits how much data you can encrypt under a single key. I think the real "tell" that this isn't hair-splitting is that people don't ever generally talk about Blowfish being "broken", just obsoleted.
that sounds "broken" to me, but i'm not a cryptographer. so, i'll defer to you when you say it's not broken. (i dont know what the cryptographer-specific definition of broken is -- it'd be great if you would shed some light on that)
