The thing is, Supsersonic will at some point become Rain. there is no way around it. You either enforce network quality or are free for all and everyone gets nothing.
While there's always a possibility, I don't believe it will become another rain for the following reasons:
+ The high cost barrier for entry bars users who wish to hammer the network on the cheap, like rain was especially during 2017-2020.
+ Their network is just built better, has far more capacity and has been in the game for far longer to be able to handle it.
+ The areas which already have some of the best speeds usually have fibre or is in a rollout stage currently, so users can move away from their network for cheaper.
That said, Süpersonic has these particular issues:
+ There's no technical assistance whatsoever, you can only file complaints in general and hope MTN issues fixes in the future.
+ The path routing is appalling, pings are quite abysmal if you're outside JHB and there's no proper QoS in place for whichever their main switchovers are.
For people like me, who is getting Frogfoot and Openserve fibre soon, I really don't mind. I've had consistently great speeds exceeding 50mbps and use an average of 1.2-1.8TB a month, and uptime has been fantastic, I've heard far worse stories with even great fibre networks.
For most others, speeds are generally quite acceptable and it does help that no FUP gets applied to hamper them further.
I believe by the time MTN does come to the point of rain-status, alternatives will be much more readily available, and there's even no guarantee as of late that this package will be available forever, so maybe a gimped package will crop up in the future to replace it.