Will 4 GB RAM MacBook Air (2015 version) work well for 5-6 years? - Quora
Can we upgrade the memory (RAM) of the Macbook Air early 2015 model? - Quora
I just bought a second hand macbook air 2015 11 inches (i5 4gb ram) and I'm shocked how well it runs for basic office writing and scientific data analysis use. : r/mac
Apple MacBook Air 2015 Intel Core i5 Processor, 8GB DDR3 RAM, 128GB SSD, 13.3″ HD LED Display | Computer Zone