Ah. The history of trims
If you want to see the chaotic progress of car manufacturer marketing teams, look no further than Ingolstadt, where Audi have quite recently decided to name their car models in odd and even numbers depending upon whether they are electric or not. And then also to change the universally misunderstood numbers and letters system for engines (35TFSI for example) with something that even they haven't revealed yet. And then this was reversed when the new A6 petrol didn't actually become the A7 because customers were confused that the A5 was actually a petrol A4. Confused? Step in JLR.
S was a V6 sport spec until it became a diesel too. And then become an entry level trim on an XE with no V6 in sight.
SE stands for Standard Equipment which has more than an S. (So what did S mean, Substandard?)
HSE stands for High Specification Equipment
R stood for V8 engines
R-S stood for monster versions of the same
R-Sport was a reaction to the competitive success of M-Sport and R-Line trims in Germany. Cars with sports kit and likely suspension but not the engines
R-Dynamic replaced R-Sport just because
I've no doubt forgotten some of them too..
And of course, for fun, you only have to go to Stuttgart, where Mercedes have had lots of fun adding tech and chopping favoured V8 engines from flagship cars only to disover that no one wants a C63 with only fake noises. Who would have thought?
Fashions come and go. Bring back the 1980s. Peak ICE car was 10 years ago.