https://www.resetera.com/threads/xbox-series-s-in-stock-at-bestbuy.381039/Its not meeting demand by the usual criteria yet but its certainly close. If you want a Series S and you haven't got one yet at this point its all on you, there's been plenty of good chances.
thread was started yesterday at ~10 pm. i just checked now (~12 hours later) and it is still available for purchase. I would say that meets my requirement as outlined in the OP for series s. stock for series s has "caught up" to demand. mark your calendars,.. it's February 19th.
I think within a month we'll be seeing series S permanently in stock.