Lyxen
Great Old One
You forgot the 3rd method: fixed array. Which is even more standard than point-buy which is presented as an optional variant in the PHB.
Good thing it was forgotten, as it's even more boring than point-buy.

- it's the fastest
- it is the most difficult to cheat
- it is the most equal to all PCs
And the most boring.

Just joking here, it's obviously a matter of taste and I understand your points.
But it's still boring.
