It's actually the opposite! To pick a representative example

    Current generation:
    m6i.large: $0.0960
    m6a.large: $0.0864
    m6g.large: $0.0770


    Previous generations:
    m5.large:  $0.0960
    m4.large:  $0.1000
    m3.large:  $0.1330
    m1.large:  $0.1750