I bought my council house.
If I hadn't, I'd not have been able to move to live nearer family when I did eventually sell it (because i would have been bottom of the list to be housed by the local authority in this area).
I offered it back to the council when I sold, in far better condition than when I bought it too - they weren't interested.
If they had reinvested the money (and my property was built toward the mid 1970s, and barely maintained since the day it was thrown up. I bought it in the early 2000s so they had many years of rent from it, it had only the windows upgraded and the boiler conversion done, no new kitchen in all that time, no new bathroom either. They also dragged what was a cash sale out for NINE MONTHS where I had to continue to pay rent, but they had no obligation to do any maintenance/repairs, before finally completing on it!), that would have been great.
They didn't, I don't know why. By the time I bought mine they were really pushing to sell off all the old council housing stock. New properties were being done by a Housing Association instead, I assume this was cheaper for them than maintaining old properties.