You only can buy it when it's out.
You could say nothing is 100% stable when it comes out,
but you could also say anything is stable when it comes out because the manufacturer should have tested it before release.
There is lemon car, so as lemon computer hardware. However there is no law to protect lemon computer hardware buyer.
Since you want to buy it in late jan, so if it's available in late jan, just do it.