I don't get the "foot off the clutch while starting" one. Maybe because it puts pressure on the thrust bearings increasing cranking resistance, but there's a lot more resistance when the transmission oil is at -20 C or -30 C....
I'd think the safety issue of not putting the car through the end of the garage is more important.
At traffic lights, the pressure on the flywheel resulting from the depressed clutch pedal places load on the thrust washers, causing them to wear. But is it more significant in an A-series than any other motor with a clutch?
Clutchless shifting (up or down... I can
go from 1st up through the gears to 4th and back down) is a useful skill when your clutch mechanism packs it in (had it happen on a Suzuki Samurai), but, in my opinion is not a good idea for general driving. Synchros are relatively small but expensive parts, intended to help a gear match tooth speed and alignment with another gear, but they do wear. They keep the ends of the gear teeth from being worn. Clutches are much easier and cheaper to replace. In past threads (many, many years ago ) there was a discussion of the relative merits of engine braking, and a wise expert (it may have been Kieth Calver) advised that brake pads are far cheaper and easier to replace than a clutch. In other words, choose your form of abuse carefully.
"Hang on a minute lads....I've got a great idea."