Hello Vera_Dobryanskaya,
Welcome to our forms!
- It was not added for a particular feature, it is just for performance in general. Additionally, the change helps have more predictable builds as x86_64 was the only architecture without a defined minimal requirement.
- No plans to support older CPUs.
- Unfortunately no. You could technical build from source and add CCFLAGS=-march=native to support your machine, but that’s a bit too much I think. MongoDB Atlas is a good alternative though.
A lot less troubles and optimal performances.
Let us know if you have any further questions!