Biden certainly wasn't my first choice, but I'll still take a half fried Biden over Ye Orange One any day of the week. Worst case, he putters through his 4-8 years nominating crayon drawings to the supreme court. 2nd worse case, he ends up a puppet for his cabinet and staffers. Next option is he goes the Regan route, and his wife drives for most of everything. Best case: he recognizes or is pressured enough, and the VP takes over.
ANY of those choices will do less damage to America long term than 4 more years of 45. And the last 2 are probably the only realistic way a woman's going to lead, at least for 10-15 more years.