They’ll buy these new toys. But will they be able to maintain them? Sub-Saharan Africa (except for South Africa) has a poor track record here. Maybe Angola can entice some Cuban aircraft mechanics to come back. But they won’t be bringing any spare parts along.
They’re really not new. They were purchased by India in the late 90s and served less than a decade before being returned to Russia.
https://medium.com/war-is-boring/belarus-is-building-an-air-force-for-oil-rich-angola-6bf616720307