So I don't normally like criticizing other teams players and I think India is an exceptional team. But I do think that Indian supporters are overblowing the quality of their seam attack. It is a very good attack, and they have very good control, but it feels like an attack that does a job without being scary. I understand at certain points that Thakur, Siraj, Shami and Bumrah have all bowled excellent spells. But none of those bowlers worry me, I don't think that they are going to bowl my side out. They need a newish ball in favourable conditions, and batsmen feeling the pressure and playing loose strokes. I think the fact that SA has an inexperienced batting line-up is the scary part as a SA supporter.
As an extreme example, I worry about every time Cummins comes on to bowl for Aus against SA just because he can do something special. Or a Broad, or Anderson. When you watched Rabada's spell there felt like an inevitability that he would start taking wickets, and possibly change the game, regardless of who was batting. I just never get that feeling with the current Indian bowlers bowling. Maybe it is a mindset because it is an Indian fast bowler, but I do remember feeling that sometimes with Zaheer Khan (always rated him).
I say all this because chasing down that total never felt like it was 'would the Indian bowlers get SA batsmen out', it felt more along the lines 'did the SA batsmen have the fortitude to survive and get the total'. The pitch was doing a bit here and there but it was not unplayable, and Wanderers always has the potential to be a fast scoring ground once you are in.
As an aside, I am very old school, and believe you play your best 6 batsmen, 4 best bowlers and wk. Hopefully their is a decent allrounder and wk/batsmen in there. I think this 5 bowler strategy of India is hurting them long term.