the other reason they procure Russian air defence systems is because some of their systems are better then some western systems. now this doesn't mean they wont procure them in the future because Algeria has been getting closer to China they recently received 50 PLZ-45 SPHs and 3 C-28A Corvettes armed completely with Chinese tech so who knows what else Algeria will go for next. they have a decent defence budget but doesn't know what to spend it on.Critical hardware are not part of the list. Not air defense systems, fighters, tanks...etc.