Although this is still true for AD environments, Microsoft has been pushing Entra ( or whatever they call it these days ) hard and would prefer for that to no longer be the case. It's also been getting harder to actually run on-prem AD at a reasonable price point per user.
Effectively, expect even enterprise to be online first with an escape hatch for those customers that need it, obviously only available on E5 or something like that...
It's just that they've been hiding it more and more for consumer installations in successive releases.