The factor that's going to matter more than anything else is what the market is doing between ages 62 and 70. If a deep bear market occurs it will be well worth it to take SS early and avoid the draws on portfolio during the downturn. So really it's a game time decision for everyone unless your stash is so large at that point that you simply don't care anymore
That might be true in some specific cases, but I don't believe it is true generally. I didn't want to spend too much time on this, but I ran two scenarios in FIRECalc. Let's say we have a Mustachian who retires right at age 62, with a standard portfolio of $1.5 million and a $67,000 annual spend (4.5 % WR). He made a modest but decent income and will receive $1100/mo SS if he claims at 62, or $2000 by delaying to age 70. I picked 4.5% because I think it is reasonable to assume at age 62 that you can count on some future SS payments for planning purposes. We also know that the minimum portfolio value would be the worst historical sequence of returns. So in this case if you started SS at 62 you were bang-on minimizing portfolio drawdown.
Both portfolios survive 100% of the time, but the worst case performance for the claim early scenario was $2,200 and $343,000 for the delayed portfolio. Delay increases portfolio safety by a lot in this case. Similar outcome if you use 4% WR. In my own situation retiring before 62, delaying also increases the minimum portfolio value by a lot.
Individual cases are so variable, e.g. retirement age, SS income, health, spending, etc. so I don't want to make a blanket statement that it is
always better to delay. But in general the 8% + inflation gain by delaying is so powerful it wipes out early SoR risk.