Horwath
Legend
not for an adventurer.a 9 con is just a bit below average.
As I said, and I think many here will say, average Con for a PC is 14.
That means that you are trailing by 3 HP per level on average.
and at 5th level, when fireballs start flying left and right, that is minus 15HP, half damage of fireball is 14. you are losing one failed save buffer with that low stat.
from last 2 campaigns, we had 11 characters with con 14 and 1 with 16(dwarf barbarian OFC)
at 5th level that is 55HP, a wizard with 8 Con would have 17 HP. with 14 Con that would be 32.
55 vs 32 is much less of headache for DM to have during encounter building than 55 vs 17. Because at 55 vs 17, whatever irritates a barbarian(counting in rage), kills the wizard.