Yes, W (Wuhan, Alpha) disappeared 6 months before Delta, and during the time, it was D614G taking over, at least in the USA.
I tried to show it many times: delta variant is B.1.617.2 including D614G, T478K, L452R and P681R.
Currently, in the USA, roughly half of the samples are D614G and 1/3 are Delta.
USA______________|_417N_452R_478K_484Q_501Y_570D_614G_681R_|___W___A___B___C___D___E___O
2020/06__________|___0%___0%___0%___0%___0%___0%___0%___0%_|_99%__0%__0%__0%__0%__0%__0% 2020/07__________|___0%___0%___0%___0%___0%___0%__99%___0%_|__0%__0%_99%__0%__0%__0%__0% 2020/08__________|___0%___0%___0%___0%___0%___0%__99%___0%_|__0%__0%_99%__0%__0%__0%__0% 2020/09__________|___0%___0%___0%___0%___0%___0%__99%___0%_|__0%__0%_99%__0%__0%__0%__0% 2020/10__________|___0%___0%___0%___0%___0%___0%__99%___0%_|__0%__0%_99%__0%__0%__0%__0% 2020/11__(__977)_|___0%___0%___0%___0%___0%___0%__99%___0%_|__0%__0%_99%__0%__0%__0%__0% 2020/12__(__873)_|___1%___1%___0%___1%___0%___0%__99%___0%_|__0%__0%_99%__1%__0%__0%__0% 2021/01__(_2682)_|___5%___4%___1%___5%___1%___0%__99%___1%_|__0%__3%_91%__4%__1%__0%__0% 2021/02__(_4927)_|___3%___9%___2%___1%___2%___0%__98%___2%_|__0%__7%_90%__1%__2%__0%__0% 2021/03__(11927)_|__15%__25%__15%___1%__15%___1%__85%__14%_|__0%_11%_73%__0%_14%__1%__0% 2021/04__(24080)_|__52%__58%__52%___4%__55%___3%__45%__52%_|__0%__6%_39%__0%_52%__3%__0% 2021/05__(27592)_|__67%__70%__66%___4%__70%___3%__30%__66%_|__0%__4%_26%__0%_66%__3%__0% 2021/06__(12070)_|__61%__63%__59%___5%__62%___3%__38%__59%_|__0%__4%_32%__2%_59%__3%__0% 2021/07__(20731)_|__25%__27%__25%__37%__28%___3%__68%__25%_|__0%__2%_32%_34%_24%__3%__5% 2021/08__(31367)_|___9%__12%__10%__71%__11%___2%__81%__10%_|__0%__1%_10%_69%__9%__1%_10% 2021/09__(_5566)_|__49%__49%__49%__22%__52%___3%__48%__49%_|__0%__3%_26%_19%_49%__0%__3% 2021/10__(_3376)_|__23%__23%__24%__18%__25%___2%__75%__23%_|__0%_11%_47%_17%_23%__0%__3% 2021/11__(_3248)_|__28%__28%__28%__16%__30%___2%__69%__28%_|__0%__7%_48%_14%_28%__0%__2%_________________|_417N_452R_478K_484Q_501Y_570D_614G_681R_|___W___A___B___C___D___E___O W=WuHan_A=452R+614G_B=484E+614G_C=484Q+614G_D=452R+478K+681R_E=478K+501Y_O=Other