@soroush and I have already pitched a similar solution for a strided(by:) method here for sequences and collections: https://forums.swift.org/t/pitch-adding-strideable-sequences. Under the proposal, ranges work like this with our current code:
for a in (1 ... 5).striding(by: 2) {
print(a) // 1, 3, 5
}
for a in (1 ... 5).reversed().striding(by: 2) {
print(a) // 5, 3, 1
}