As the title says, i suggest the possibility to enable/disable the track objects, for low-end PCs benefit of improved framerate even with a considerable number of cars ahead.
The idea is that, much like NASCAR Racing 2003, you could choose between 3 levels of "population".
None (absolutely nothing around the track. only objects that are essential to the simulation are visible)
Some (a few buildings here and there. for the users who want some detail o the tracks, but doesn't have the power needed to go with the maximum setting below)
Full (maximum eyecandy. for those whohave a pc to do it of course)
After taking another look at the videos, i have to admit that i was wrong
Now at least i have 2 great videos here
But here's something strange, some websites like motorsports.com (or whatever it is called) make references to sequential manual gearboxes in the McLarens.
Sorry for quoting an old post, but i felt myself forced to register here just to post this
Actually, they did use Sequential Manual Gearboxes on F1 cars, but it appears that they weren't used for much time. As a example we have the McLaren MP4/5B (1990), the MP4/6 (1991) and the MP4/6B raced early in 1992. The videos you posted are actually from 1989 so the presence of the H-Shifter
Now off to a visual proof.
This is the lap that gave Senna the pole on the 1990 Monaco GP. Clear use of the Sequential Manual Gearbox can be seen here
Moving ahead in time, to 1991. Onboard camera again in Senna's car as he poles his McLaren at Interlagos. The video has subtitles in Brazilian Portuguese, so it covers the critical part for us. But its pretty clear when he brakes for the 1st corner (named Senna's S) that its a SMG in use
But as you said, Semi-Automatic Gearboxes were introduced in 1989 by Ferrari. But it was very unreliable. Williams first used it 1991 and it was pretty unreliable too, until midseason when they made a massive upgrade to the car, but it was too late to catch Senna in the points, giving the brazilian his 3rd World Championship
But the 1992 and 1993 domination we know very well, so i won't talk about it here