There is just no way to know. He loved doing what he did. And they ruined it for him.I don't think he would have coached another 10 years regardless and getting to 400 (even if so) would have been tough as he got older.
I don't think the overall wins total matters as much as the NC to seasons coached.
Had he not spent so much time in the pros imagine what his win totals could have been. But, he soaked up all the knowledge he had from all of his influencers and coaches and he "cashed it in" so to speak after just 28 seasons as a college HC and won over 80% of his games.
And when he figured out the NC winning formula starting with LSU in 2003, in the next 20 years he won 7 NCs. Simply amazing!!!
The wins total thing is important to me, in a way, but I realize it’s not to most others. I agree the NC totals are the most impressive feat.