Lightweight footwear - I wear Lunarglides to run in if that counts? They're fairly lightweight 
I won't argue that many other cultures have developed or maintained better techniques than we have in the western world - but we are not Nepalese sherpas or African runners. They have developed that technique from birth. I think to attempt the same approach as a developed adult in the "soft" western world is likely to cause more issues than to just accept it and use tech to improve what we have. All in my opinion of course.
If you're talking about running in boots, you're talking about running in real boots to my mind - something like the Para 10, the Nijmegen and Baatan marches are things that should be done in "real" boots, due to a combination of safety, tradition and respect for what the events stand for. It might be worth saying that in the Army Combat Fitness Test, you only really run a few hundred metres in every mile - the rest is "tabbing" - fast, long, paces. The Advanced Combat Fitness Test is more of a run - but you use a technique very different to tabbing or normal running to lessen the impact on your joints; I would describe my movement as "skimming".
I will admit there is likely to be a little bit of military eliteism there as well - in a similar way runners with good times and high personal standards may look down on "fun runners", RFL'ers and similar; the likelyhood is that someone turning up at the Para 10 with a pair of approach shoes on. rightly or wrongly, look like they're just playing at it and.. well.. it doesn't really count because they were practically wearing trainers 
Also personal opinion is that Magnums aren't much cop for anything other than "Office boots" with regards to my experience and my feet - but other people swear by them so...
I fully understand that the OP is likely to rarely wear proper boots, which is why I tried to emphasise the importance of taking time to build up distance and weight slowly. Someone might be able to comfortably run a sub-3 hour maratheon, but trying to run 2 miles in boots the first time might just cripple them!