You underestimate the capacity for VW to "improve" things in a 20 year period.
The Golf 6 was largely a Facelift of Mk5 with some of the more expensive to make things removed. Yours I seem to recall is a facelift of that facelift with a new engine and tech lift inside but largely similar story to the Toyota where despite having a new engine, interior and face the bones were designed in the early to mid 2000s.
Yes and no, the mk6 hatch maybe, the cabriolet didn’t launch until 2011 and while the “platform” is largely the same everything from the bottom of the windscreen back was re-engineered from new on the cabrio.. including a different windscreen even the wipers are different on the cab so there are a lot of differences.
It was also built in Osnabrück which is their go to factory for special/low production number cars so even the assembly line is different.
That being said a lot of things in the world of VW are rarely re-invented, more that they evolve over time. They engineer a window switch and that will get used in every car, for 20 years with some minor cosmetic changes over time.
The climate control again gets used in ever VAG car with cosmetic changes for decades that does tend to mean that things like switches buttons etc , the bits you touch and interact with, don’t really break…
Unless they reinvent it all for an electric car and the software engineers screw everything up.
While jocks Scala is a much newer car you probably wouldn’t need to scratch the surface too hard to find the buttons switched knobs pipes hinges levers and so on, all share the same DNA as those found in my golf or older. You have to remember with vag things filter down so what was new on an Audi or Bentley 10 years ago will work its way down to a skoda fabia at some point.
Cosmetically it’s a very different car, it shares a lot in common with the mk7 golf, but the mk7 golf shares a huge amount in common with the mk6
Not being the top end all singing all dancing model, jock probably avoiding a lot of the much newer stuff with dodgy software