The start/stop/step sound like they might be nice. But that wouldn't give you a length, since you never know when an iterator will be exhausted. I feel like `len(islice(it, 1, 1_000_000))` telling you the "maximum possible length" is more a danger than a help.
The dead increasingly dominate and strangle both the living and the
not-yet born. Vampiric capital and undead corporate persons abuse
the lives and control the thoughts of homo faber. Ideas, once born,
become abortifacients against new conceptions.