Just received this from Gracy Travel:

JNB BAGGAGE UPDATE:
Please note: Round or irregular-shaped bags will not be allowed at check-in counters. Bags with longs straps will not be allowed at check-in counters. Passengers trying to check in bags that do not conform to these rules will be offered the option of having their baggage wrapped with one flat side at airport approved baggage wrapping stations.

https://mail.google.com/mail/u...a&view=att&disp=safe

Just one more nail in the coffin so to speak!
I wonder if straps on daypack are considered long straps? Probably like all things SAA, depends on the agent when checking in.

I wouldn't use soft luggage through Johannesburg regardless!