Since you got your licence (assuming that was around ~2005 or earlier), there have been several significant changes in how SA does driver licensing. Some of the key shifts:

Change What it used to be / when vs. what it is now
Graduated Licensing Scheme (GLS) The GLS has been around since 1989. But the rules for L’s and P’s have tightened over time—more supervision, stricter conditions.
Minimum time on Learner’s permit & logbook hours In early 2000s, there was a minimum L-permit time of 6 months for many younger people. The logbook hours required were fewer (often 50 hours with 10 at night) in earlier years. Now it’s 75 hours including 15 at night.
Theory test + Road rules questions The pass mark for theory tests raised: early 2000s, theory test pass mark was lower; more recent changes increased pass standard.
Introduction of hazard perception test (HPT) This is relatively new. Not required 20-odd years ago. Now compulsory before P1.
P1 / P2 stages and length The provisional licence is now split into P1 and P2, with defined minimum durations (1 year P1, 2 years P2). In earlier times there might have been simpler provisional licence without the staged split, or different time requirements.
Restrictions for P1 (passenger, night) More detailed restrictions now especially for younger P1 drivers: passenger restrictions (peers), night-time curfews, zero alcohol/drugs. These are stronger than older rules.
Digital / online options Newer licences involve online courses (myLs), online hazard perception testing, digital log books / apps sometimes etc. These were not options back then.
Fees, renewals, examinations Over time, fees have changed. Some rules about what happens if a permit expires, or lapses. Also there have been changes in how disqualifications or demerit points affect holding or regaining stages/licences.