>>96177921
>You’ll note I didn’t factor race at any point across the whole thing
Except it's important to understand the rules in the context of the game they're being played in. All races got at least a +2 in a stat. Humans got a floating +2, most of the intended PC races were given a +2 to a stat, and then a choice between a +2 to one stat or +2 to another stat. (for example: Dwarves got a +2 Con, and then a choice between +2 Str or +2 Wis.) This was not always the case, but is the case after erratas.
Unless you were going for some incredibly niche builds, you were putting the +2 in your primary stat.

>except that I believe 4e still has 4d6 drop lowest as the default method of generating stats
And you would be wrong. I actually grabbed my PHB to double check this.
4th edition has 3 methods listed. Method one is the 4e standard array: 16, 14, 13, 12, 11, 10. This is the array given in the PHB.
Method two is "customizing scores", where in you start with an array of 10, 10, 10, 10, 10, 8 and 22 points with which to spend on raising stats.
Method 3 was rolling stats, 4d6 drop lowest. While not RAW, worth mentioning the book also advised on these two things:
1. that your DM might ask you to reroll if your stats were below a total of +4 or above a +8 before factoring in racial modifiers. Not a hard rule, but you can feel WotC's suggestion.
2. That rolled stats were barred in RPGA use.

Now, if we are going by order in the book, the intended way to play is using the array. Gives you a 16 to your primary stat before racial modifiers. With racial modifiers, an 18.
However, I'll mention that in the builder that WotC themselves gave you, they assumed you were using method 2. Arrays were hidden behind a button, and you were given multiple options.
I'll also point out, since we're discussing the builder. If you hit that autopick button, it will always put an 18 in your primary stat.