Great question, I am glad you asked that question.
1950s to 1980 they averaged 5.5 wins per season (vs 4.6 losses, ie barely over .500)
1980s avg record 9.1 - 2.1 (incl five 10 win seasons and a 12-0 season)
1990-2000s avg record 7 - 5 (good but not great, Bob)
2011-2020 avg record 12 - 2 (totally elite)
So they were very average for a long time, real good in the 1980s, average again for 20 years, but freaking awesome the last decade.
Things CAN change, with the right coach and support. This also says a lot about recency bias.
If Clemson can do it, so can someone else in the B12.