I do agree the Central Freeway is a glorified half-mile ramp to US-101 south and I-80 East. I got to agree with skluth's points though. I'm not sure what the land would be re-used for. More public housing? There's public housing already and more coming throughout the city.
Can be, but should? SF is creating a situation where driving is a necessity but extremely inconvenient.
In downtown, yes extremely inconvenient, but in that case I'd say public transit is good enough to get around (but not international wise.) In most of the city though I think the geography especially hills and slopes make driving inconvenient. Now owning a car in SF as opposed to being thru traffic is a real pain.
So what is the thru traffic? Chopped liver?
From my experience:
North to Marin/Sonoma/Mendocino countries: I-280 -> CA 1 at Daly City -> US 101 right before the Golden Gate Bridge
North to Sacramento/Oregon: I-80 -> I-505 -> I-5
East to Reno and beyond: I-80
South in the Bay Area: I-280/US 101 south, taking CA-85 if necessary
South to LA/San Diego: I-80 -> I-580 -> I-5
Of all these directions, the first is a real slog to get through but it's "consistent" in that it usually takes me the same amount of time for me to get to the Bay Bridge (30 min from across town in SF) In all the days of the week, daytime traffic through the Bay Bridge has always been bad, the pandemic did not appear to change that despite traffic on US-101 in the peninsula being better than pre-2020.