Average time to roll-up a new 1st level character, assuming basic familiarity, no digital tools used, rolling abilities at the table (with real dice), and ordinary choices w/o optimization-shopping:
BECMI: 5–10 minutes
OSE Basic Fantasy (B/X-style, race-as-class): 5–10 minutes
Shadowdark: 5–15 minutes
OSE Advanced Fantasy (race + class): 10–20 minutes
AD&D 1e (PHB only): 10–20 minutes
D&D 5e 2014 PHB: 20–40 minutes
D&D 5e 2024: 20–40 minutes