When I went to Cape Town the internet was awful. Super slow (at least for US/EU sites) and with very restrictive data caps (IIRC, 10GB per month). That was circa 2008 so perhaps things are better now
I was mostly joking but 10GB even in 2008 still isn't a lot. 300gb hard drives were pretty common. Although I bet you could've got a lot more out of that 10GB than you can now what with the absurd amount of ads and excessive bloat on websites nowadays.
It's much, MUCH more developed than you're thinking. Hundreds of thousands of people in a very beautiful and modern city.