hello,
The
standard
rollbars are not bad.
Nevertheless they not up to everything.
For a roll sideways they will do everything you need.
If you would slide forward, there would be the possibility of them bending backwards.....that said, you would need to go fast or slide into something really solid.
If you want to cover that, then a 4point cage would be the solution for that.
custom cages do make them as you want.
Again this doesn't cover everything....going to 6 point cages and even full 8point cages....but these last 2 are not really for normal road cars.