Alexandrinus is a treasure of humanity. I'm not going to entertain the person you're speaking to because he knows very little about subject.
There is no comparison of Alexandrinus vs Sinaiticus/Vaticanus.
There are only a hand full of readings in the MT that are superior to the Greek OT. Only a handful. Lets educate
@koberstein
The MT is no later than the 10th century and is written in a script that is not original to the Paleo-Hebrew script wherein the origins of the Hebrew OT came. The current block scripts Hebrew has changed significant from the 1st century AD through to the 10th century AD and is NOT the best example to be found of the OT. The Greek OT extant in Alexandrinus is far superior to the MT. I can prove it. The modern Hebrew language merged within other Ancient Semitic languages such as Aramaic and other regional dialects.
Lets educate
@koberstein
I look forward to your response. I was where you are now 35 years ago. I hope I can help with you expanding your knowledge.