I've used that method fairly often in the past.One of the earlier editions (AD&D 2e?) had a method of starting with 8 in every score, rolling 7 6-sided dice, and adding the values of each die to ability scores. You didn't total the dice, however, you added each die result to one score.
For example, rolling 1, 2, 2, 3, 3, 4, 6.
You might go STR 8+6+2 = 16, DEX 8+2 = 10, CON 8+3+4=15, INT 8, WIS 8, CHA 8+3+1=12.
Has anyone tried this, or similar, in 5E?
The only hang-ups I've ever had about it is that you end up looking at either having 2 high scores and a bunch of 8s - which wasn't a big deal in AD&D - or you have your highest score end up a 15 only with great luck - which was a disappointment in AD&D, but might actually be more manageable in 5th edition.