And, I guess, it may be worth making another point.
It is impossible to have endemic Covid with low prevalence and low level restrictions. The level of endemic transmission is driven by two factors: (1) virus transmissibility - which, as we know, is very high for Delta and (2) speed of immunity waning.
Low level restrictions (e.g. masks) do not significantly impact (1). The latest SAGE documents published last week still suggest masks might reduce transmission by about 10%. The famous RCT from Bangladesh has produced a very similar result (9-12%).
When Covid eventually becomes fully endemic, with the current level of vaccine efficacy, we will continue seeing tens of thousands cases per day. The estimates I have seen range from 20,000 (Francois Balloux - symptomatic cases) to 45,000 (Paul Hunter). There will be an element of seasonality so numbers in winter will be higher than in summer but 20,000-50,000 is probably a reasonable ballpark estimate. The version of the world where Covid is circulating at very low levels (500-1,000-5,000 cases per day) is simply not feasible unless we see another vaccine miracle.